The document discusses seismic drift in reinforced concrete (RC) buildings with soft first stories. It analyzes a 6-story RC building model in different seismic zones using STAAD-Pro software. Response spectrum analysis was performed and results like average displacement and inter-story drift are presented in tables for the bare frame and with a soft story at the ground floor. The analysis shows drift exceeds permissible limits for some zones, especially for the soft story model. Therefore special consideration is needed in design of buildings with vertical irregularities like soft stories.
An analysis of multi-storey building with floating and non-floating column un...IRJET Journal
1) The document analyzes the effects of floating columns in multi-storey buildings under seismic loading in different zones.
2) Static and equivalent static analyses were performed on models with and without floating columns to study structural response quantities like base shear, storey drift and displacements.
3) The results show that buildings with floating columns in seismic zones have increased displacements and decreased base shear and stiffness compared to buildings without floating columns. Floating columns are therefore not advisable in high seismic zones.
IRJET- Seismic Analysis of Buildings with Shear Wall having Horizontal Ir...IRJET Journal
This document analyzes the seismic behavior of five 6-story buildings with horizontal irregularities: E-shaped, I-shaped, L-shaped, +-shaped, and box-shaped. The buildings are modeled in SAP2000 and analyzed using response spectrum analysis according to Indian codes for seismic design. Parameters like lateral displacement, base shear, story drift, and period are compared. Results show the E-shaped building experiences the highest base shear and lateral displacement, while the +-shaped building experiences the lowest. The L-shaped building has the highest displacement in the X-direction, while the +-shaped building remains the lowest. In conclusion, horizontal irregularity affects the seismic response of buildings.
IRJET- Comparative Analysis of Seismic Behavior of Flat Slab and Conventional...IRJET Journal
This document presents a comparative analysis of the seismic behavior of flat slab and conventional reinforced concrete framed structures. It discusses how flat slab structures, which do not have beams but instead have columns that directly support the slab, have more flexibility under lateral loads than conventional framed structures. The document reviews past research on the seismic response of flat slab buildings and their performance compared to framed structures. It then describes the methodology used, including dynamic analysis via time history and response spectrum methods. Models of a 9-story flat slab structure and conventional framed structure were created in ETABS software and their storey displacements, storey shears, base shears, and overall seismic performances were compared. Results showed the flat slab structure experienced greater displacements, store
IRJET- A Research on Comparing the Effect of Seismic Waves on Multistoried Bu...IRJET Journal
The document compares the effect of seismic waves on multistoried buildings with and without shear walls and flanged concrete columns. Three 10-story building models are analyzed using STAAD Pro: Model 1 without seismic resisting structures, Model 2 with concentrically located shear walls along the exterior, and Model 3 with flanged concrete columns along the exterior. Model 2 and 3 experience approximately 10% less lateral force and base shear compared to Model 1. Introducing shear walls or flanged columns improves seismic performance by increasing stiffness and reducing displacements, stresses, and forces in the building. While shear walls provide the greatest stability, flanged columns also enhance seismic resistance and may be more economical for some applications.
Design & Analysis of High rise Building With & Without Floating Column Using ...IJSRD
At present buildings with floating column is a typical feature in the modern multistory construction in urban India. There are many projects in which floating columns are adopted, especially above the ground floor, where transfer girders are employed, so that more open space is available in the ground floor. As the load path in the floating columns is not continuous, they are more vulnerable to the seismic activity. Sometimes, to meet the requirements these type of aspects cannot be avoided though these are not found to be of safe. Hence, an attempt is taken to study the behavior of a G+15 multi storey building in which some storey’s are considered for commercial purpose and remaining storey’s are for residential purpose. This paper studies the comparison & seismic analysis of the multistory buildings with floating column and without floating column. Finally, analysis & results in the high rise building such as storey drifts, storey displacement, and Base shear were shown in this study. Design and Analysis was carried out by using Extended Three Dimensional Analysis of Building Systems (ETABS) Software.
IRJET- A Parametric Study on the Siesmic Performance of Flat Slab Multi-S...IRJET Journal
This document summarizes a research paper that analyzes the seismic performance of 10-story flat slab buildings with bracing subjected to different types of irregularities.
The paper models a regular flat slab building and flat slab buildings with vertical geometric irregularities, stiffness irregularities, and torsional irregularities using ETABS software. Response spectrum analysis is performed to analyze story drift, time period, story displacement, base shear, and story stiffness.
The results show that the building with torsional irregularities experienced the highest story displacements, around 24% more than the regular building. Buildings with vertical geometric and stiffness irregularities also had increased story displacements compared to the regular building, but to a lesser extent.
Seismic Analysis of Multi Storied Irregular Building using Flat Slab and Gri...IRJET Journal
This document analyzes the seismic performance of multi-story buildings with flat slab and grid slab structures in seismic zones III and V. Finite element software ETABS is used to model T-shaped and L-shaped buildings with 15 stories and both slab systems. Response spectrum analysis is conducted to determine parameters like base shear and storey shear. The results show that grid slab structures experience higher base shear values than equivalent flat slab buildings in both zones. In conclusion, grid slab structures perform poorer seismically compared to flat slab structures for the building geometries and conditions analyzed.
IRJET- Study on Soft Storey Effect of Plan Regular and Irregular RC Frame...IRJET Journal
This document presents the results of a study analyzing the seismic performance of reinforced concrete framed structures with different plan configurations (regular vs. irregular) and the presence or absence of a soft story. 12 structural models were analyzed using SAP2000 software, considering seismic zones II and V. The results showed that structures with an irregular plan and without masonry infill walls experienced the highest displacements and drifts. Structures with a soft story also had increased drifts. Infill walls increased base shear and stiffness, resulting in lower displacements. Overall, regular structures with masonry infill performed best seismically.
An analysis of multi-storey building with floating and non-floating column un...IRJET Journal
1) The document analyzes the effects of floating columns in multi-storey buildings under seismic loading in different zones.
2) Static and equivalent static analyses were performed on models with and without floating columns to study structural response quantities like base shear, storey drift and displacements.
3) The results show that buildings with floating columns in seismic zones have increased displacements and decreased base shear and stiffness compared to buildings without floating columns. Floating columns are therefore not advisable in high seismic zones.
IRJET- Seismic Analysis of Buildings with Shear Wall having Horizontal Ir...IRJET Journal
This document analyzes the seismic behavior of five 6-story buildings with horizontal irregularities: E-shaped, I-shaped, L-shaped, +-shaped, and box-shaped. The buildings are modeled in SAP2000 and analyzed using response spectrum analysis according to Indian codes for seismic design. Parameters like lateral displacement, base shear, story drift, and period are compared. Results show the E-shaped building experiences the highest base shear and lateral displacement, while the +-shaped building experiences the lowest. The L-shaped building has the highest displacement in the X-direction, while the +-shaped building remains the lowest. In conclusion, horizontal irregularity affects the seismic response of buildings.
IRJET- Comparative Analysis of Seismic Behavior of Flat Slab and Conventional...IRJET Journal
This document presents a comparative analysis of the seismic behavior of flat slab and conventional reinforced concrete framed structures. It discusses how flat slab structures, which do not have beams but instead have columns that directly support the slab, have more flexibility under lateral loads than conventional framed structures. The document reviews past research on the seismic response of flat slab buildings and their performance compared to framed structures. It then describes the methodology used, including dynamic analysis via time history and response spectrum methods. Models of a 9-story flat slab structure and conventional framed structure were created in ETABS software and their storey displacements, storey shears, base shears, and overall seismic performances were compared. Results showed the flat slab structure experienced greater displacements, store
IRJET- A Research on Comparing the Effect of Seismic Waves on Multistoried Bu...IRJET Journal
The document compares the effect of seismic waves on multistoried buildings with and without shear walls and flanged concrete columns. Three 10-story building models are analyzed using STAAD Pro: Model 1 without seismic resisting structures, Model 2 with concentrically located shear walls along the exterior, and Model 3 with flanged concrete columns along the exterior. Model 2 and 3 experience approximately 10% less lateral force and base shear compared to Model 1. Introducing shear walls or flanged columns improves seismic performance by increasing stiffness and reducing displacements, stresses, and forces in the building. While shear walls provide the greatest stability, flanged columns also enhance seismic resistance and may be more economical for some applications.
Design & Analysis of High rise Building With & Without Floating Column Using ...IJSRD
At present buildings with floating column is a typical feature in the modern multistory construction in urban India. There are many projects in which floating columns are adopted, especially above the ground floor, where transfer girders are employed, so that more open space is available in the ground floor. As the load path in the floating columns is not continuous, they are more vulnerable to the seismic activity. Sometimes, to meet the requirements these type of aspects cannot be avoided though these are not found to be of safe. Hence, an attempt is taken to study the behavior of a G+15 multi storey building in which some storey’s are considered for commercial purpose and remaining storey’s are for residential purpose. This paper studies the comparison & seismic analysis of the multistory buildings with floating column and without floating column. Finally, analysis & results in the high rise building such as storey drifts, storey displacement, and Base shear were shown in this study. Design and Analysis was carried out by using Extended Three Dimensional Analysis of Building Systems (ETABS) Software.
IRJET- A Parametric Study on the Siesmic Performance of Flat Slab Multi-S...IRJET Journal
This document summarizes a research paper that analyzes the seismic performance of 10-story flat slab buildings with bracing subjected to different types of irregularities.
The paper models a regular flat slab building and flat slab buildings with vertical geometric irregularities, stiffness irregularities, and torsional irregularities using ETABS software. Response spectrum analysis is performed to analyze story drift, time period, story displacement, base shear, and story stiffness.
The results show that the building with torsional irregularities experienced the highest story displacements, around 24% more than the regular building. Buildings with vertical geometric and stiffness irregularities also had increased story displacements compared to the regular building, but to a lesser extent.
Seismic Analysis of Multi Storied Irregular Building using Flat Slab and Gri...IRJET Journal
This document analyzes the seismic performance of multi-story buildings with flat slab and grid slab structures in seismic zones III and V. Finite element software ETABS is used to model T-shaped and L-shaped buildings with 15 stories and both slab systems. Response spectrum analysis is conducted to determine parameters like base shear and storey shear. The results show that grid slab structures experience higher base shear values than equivalent flat slab buildings in both zones. In conclusion, grid slab structures perform poorer seismically compared to flat slab structures for the building geometries and conditions analyzed.
IRJET- Study on Soft Storey Effect of Plan Regular and Irregular RC Frame...IRJET Journal
This document presents the results of a study analyzing the seismic performance of reinforced concrete framed structures with different plan configurations (regular vs. irregular) and the presence or absence of a soft story. 12 structural models were analyzed using SAP2000 software, considering seismic zones II and V. The results showed that structures with an irregular plan and without masonry infill walls experienced the highest displacements and drifts. Structures with a soft story also had increased drifts. Infill walls increased base shear and stiffness, resulting in lower displacements. Overall, regular structures with masonry infill performed best seismically.
Influence of Combine Vertical Irregularities in the Response of Earthquake Re...IOSRJMCE
This document discusses the influence of vertical irregularities on the seismic response of reinforced concrete structures through nonlinear static (pushover) analysis. Five 17-story reinforced concrete building models with different vertical setback configurations are analyzed: one regular model and four models with increasing mass, stiffness and vertical setback irregularities. The results show that vertical irregularities reduce lateral load capacity and increase lateral displacement, base shear, and performance point compared to the regular structure. Plastic hinges form at different stages for each model based on their performance level. It is concluded that increasing vertical irregularities negatively impact seismic performance by decreasing flexural and shear strength demands.
Effect of Infill and Mass Irregularity on RC Building under Seismic LoadingIRJET Journal
The document summarizes a study on the effect of infill and mass irregularity on the seismic performance of reinforced concrete buildings. Nine building models were analyzed, including regular bare frame models and models with irregularities due to partial masonry infill or additional mass at certain floors. Response spectrum analysis was conducted on the models and responses like displacement, drift, overturning moment, shear force and stiffness were compared. The results showed that infill walls enhance seismic performance by reducing displacement and drift, while increasing stiffness, but cause higher forces. Mass irregularity increased displacement, drift and forces in intermediate floors but had little effect at the top and bottom. Irregular buildings generally performed poorer under seismic loading than the regular bare frame model.
Design And Analysis Of Precast Load Bearing Walls For Multi Storey Building ...IJMER
In the present scenario of construction industry, time of construction is very crucial factor.
Pre-cast construction is gaining significance in general and urban areas in particular. The precast
technology is a viable and alternative technique to reduce the construction time. G+11 storey live
project is taken for analysis and design with load bearing walls. Design of precast wall panels and
design of precast slabs is carried using Indian codes subjected to gravity and lateral loads (seismic and
wind). Connections of wall to wall, wall to slab and foundation beam to wall is designed. The structural
system consists of load bearing walls and one-way slabs for gravity and lateral loads have been taken
for analysis using ETABS. Various wall forces, displacements and moments have been worked out for
different load combinations. Data base is presented for the worst load combination
IRJET- Impact of Shear Wall to Reduce Torsional Effect for Unsymmetrical R.C....IRJET Journal
This document presents a study on analyzing the torsional effects on symmetrical and unsymmetrical reinforced concrete framed buildings under seismic loading. Time history analysis is performed on 10-storey symmetrical and L-shaped unsymmetrical buildings using MATLAB. The response quantities like base shear, displacement and torsional moment are obtained and compared for bare frame, frame with infill walls and frame with shear walls. The results show that the unsymmetrical bare frame experiences higher base shear, displacement and torsional moment compared to the symmetrical frame. Infill walls and shear walls are found to effectively reduce the torsional effects in the unsymmetrical building by shifting the center of rigidity closer to the center of mass.
IRJET- Retrofitting of Reinforced Concrete Frames using different X Braci...IRJET Journal
This document discusses retrofitting an existing reinforced concrete industrial building in seismic zone III of India using different X bracing configurations. The building is modeled in ETABS software and analyzed using equivalent static analysis both without bracing and with different X bracing configurations including alternate, corner, and middle bracing systems. Results are compared in terms of lateral displacement, story drift, bending moment, shear force, axial force, and story stiffness. It is found that lateral displacement and story drift are reduced the most, by around 75%, for the middle bracing configuration compared to the unbraced structure, indicating it provides the best seismic performance improvement through retrofitting.
Seismic performance of r c buildings on sloping grounds with different types ...eSAT Journals
Abstract
Structure are highly susceptible to serve damages in earthquake scenario, so choosing an appropriate lateral force resisting
bracing systems will have a significant effect on performance of the structure. So this present study is aimed at evaluating and
comparing various types of eccentric steel bracings for 12 storey RC frame building resisting on sloping ground configurations.
For this 5 types of bracing systems like X-Bracing, Diagonal bracing, K- bracing, V-bracing and inverted V bracing are
considered on the outer periphery of the buildings with step back and set back – step back type configurations are modeled and
analyzed. The models are compared for different aspects within the structure, such as the maximum storey displacement, base
shear, storey drift and storey shear, the structure is analyzed for seismic zone V and medium soil condition as per IS 1893:2002
using ETABS software. Results conclude that on sloping ground due to irregularity on ground surface, the structures are more
vulnerable to earthquakes. Hence use of eccentric steel bracing is an effective and economical way to resist earthquake forces,
Inverted V type bracing performs well compared to other bracing types. By using inverted V type bracing in step back buildings
types maximum storey displacement of 70% and storey drift of 66% are obtained. Similarly for setback – step back configuration
maximum storey displacement of 74% and storey drift of 70% are obtained respectively.
Keywords: X-Bracing, Diagonal Bracing, K- Bracing, V-Bracing and Inverted V Bracing
IRJET- Non Linear Static Analysis of Frame with and without InfillsIRJET Journal
This document analyzes the effect of masonry infill walls on the seismic performance of reinforced concrete frames through nonlinear static (pushover) analysis. A 4-story building located in seismic zone 2 of India was modeled in SAP2000 both with and without infill walls. Infill walls were modeled using equivalent compression struts. Results showed that the presence of infill walls increased the building's stiffness, base shear capacity, and changed the failure mechanism from a soft-story collapse to a truss action. Comparison of load-displacement curves and hinge formations indicated infill walls significantly improve the building's lateral resistance and shift plastic hinging to joints at the infill-frame interface.
IRJET- Seismic Analysis of Multi-Storied Building with Floating ColumnIRJET Journal
This document presents the results of a seismic analysis of multi-story buildings with floating columns located at the 8th story. Three building models were analyzed: a 12-story building, 14-story building, and 16-story building, all with plan dimensions of 21m x 21m. The buildings were analyzed for different seismic zones using ETABS software. The analysis found that lateral displacement and story drift increased from lower to higher seismic zones due to the increased ground motion. For some models and zones, displacement values exceeded permissible limits, requiring strengthening of structural members. In general, displacement was greater in the Y-direction than the X-direction. The presence of a floating column increased displacement and drift compared to buildings without floating columns,
Seismic Analysis of G 10 Storey Building with Various Locations of Shear Wall...ijtsrd
Shear walls are specially designed structural members provided in the multi storey buildings to resist lateral forces. These walls have very high in plane strength and stiffness, which can resist large horizontal forces and can support gravity loads. There are lots of literatures available to design and analyse the shear wall. Ravi Kumar Vishwakarma | Vipin Kumar Tiwari "Seismic Analysis of G+10 Storey Building with Various Locations of Shear Walls using Etabs" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd43646.pdf Paper URL: https://www.ijtsrd.comengineering/structural-engineering/43646/seismic-analysis-of-g10-storey-building-with-various-locations-of-shear-walls-using-etabs/ravi-kumar-vishwakarma
IRJET- Planning, Design & Analysis of a Commercial Building with Flat Sla...IRJET Journal
This document summarizes the planning, design, and analysis of a commercial building with flat slab structure considering earthquake forces using ETABS software. 25 models of multi-story reinforced concrete flat slab structures with varying aspect ratios and slenderness ratios were modeled and analyzed using response spectrum analysis. The objectives were to calculate design lateral forces, study structural response in seismic zone III, and determine limit aspect and slenderness ratios for structural safety and stability.
PLANNING AND DESIGN OF G+3 RESIDENTIAL HOUSING COMPLEX (Share By Suman Sau)Suman Sau
The document outlines the planning and design of a G+3 residential housing complex project. It discusses the objectives of designing a 17 unit apartment building with 3 stories using RCC framing. It describes the key elements of the complex like residential buildings, roads, school, and amenities. It also discusses the software used like AutoCAD and STAAD Pro, the methodology of selecting the site, creating master plans and designs, and analyzing the structure. Load cases, design of beams, columns, and slabs are also summarized.
IRJET- An Innovative Method of Electricity Generation from Speed-Breakers of ...IRJET Journal
This document summarizes research on analyzing the seismic performance of flat slab and flat plate buildings compared to conventional beam-column buildings. A 10-story building model is analyzed using ETABS software to study the effects of adding steel bracing or shear walls. Previous studies on using different bracing configurations, increasing building height, and replacing columns with shear walls are reviewed. The current study analyzes buildings with flat slabs or plates and variable stiffness by adding bracing or walls at different locations. Response parameters like displacement, drift, shear and period are compared to evaluate the performance of walls versus bracing in improving seismic resistance of flat slab structures.
IRJET- Seismic Analysis of Vertically Irregular RC Framed Structure using X- ...IRJET Journal
This document analyzes the seismic performance of a vertically irregular 20-story reinforced concrete framed structure with and without X-bracing and bundled tubes. The structure is analyzed using STAAD PRO software for zones III, IV, and V with hard soil. Results show that adding X-bracing and bundled tubes increases base shear by up to 45.5% and reduces displacement by up to 47.4%, indicating increased strength and stiffness. Maximum base shear and least displacement occurred in zone III, suggesting it provides the best seismic performance. Therefore, using X-bracing and bundled tubes can effectively resist lateral seismic forces in tall, vertically irregular structures.
This document analyzes the behavior of 20-story reinforced concrete I-shaped buildings located in different seismic zones, considering the effects of plan dimensions, seismic zone, and infill walls. It is observed that maximum story drift occurs in Zone V. The presence of infill walls reduces story drifts. Both design ultimate positive and negative moments in transfer girders and main beams decrease when infill wall effects are included. The response spectrum method predicts lower maximum story drift than the equivalent lateral force method in most cases.
This document provides guidelines for the design and construction of raft foundations. It discusses different types of raft foundations and factors to consider in the design such as allowable bearing pressure, depth of foundation, subsoil water pressure, properties of the supporting soil, rigidity of the foundation and superstructure, and methods of analysis. The main methods of analysis described are the conventional or rigid foundation method based on linear distribution of contact pressure, and simplified flexible foundation methods. Design parameters like modulus of elasticity and subgrade reaction are also addressed.
This document summarizes a thesis analyzing the seismic performance of a 13-story building model with and without shear walls. Two models are considered: a bare frame structure and a shear wall frame structure. Both models are analyzed using ETABS software under wind and earthquake loading conditions in Seismic Zone III. The results show that the shear wall structure performs much better in terms of limiting lateral displacement, storey drift, and increasing stiffness and strength. It is concluded that the shear wall frame structure provides more reliable performance against lateral loads.
IRJET- Static and Dynamic Analysis of Multistorey Buildings having Floating C...IRJET Journal
This document analyzes the behavior of multistory buildings with floating columns, which do not extend all the way from the top floor to the foundation. Three building models with 9, 12, and 15 stories are analyzed with and without shear walls using static and dynamic methods. The buildings are assumed to be located in seismic zones III, IV, and V. Response parameters of lateral displacement and story drift are compared. Results show that story drift and displacement increase with zone intensity and number of stories. Shear walls and dynamic analysis help reduce drift and displacement. Dynamic analysis provides more accurate results than static analysis. In conclusion, floating columns can increase vulnerability in earthquakes, but this can be mitigated with shear walls.
IRJET- Evaluation of R.C. Multi-Storey Building Response under the Effect of ...IRJET Journal
This document evaluates the response of a 12-story reinforced concrete building with and without considering soil-structure interaction (SSI). The building is modeled in ETABS and its raft foundation is modeled in SAFE. Results show that accounting for SSI (modeling the building on flexible soil springs) increases story drift ratios, displacements, and bending moments compared to fixed-base modeling. SSI has an unfavorable effect and should be considered in seismic design for more accurate response evaluation.
Finger Movement Based Wearable Communication & Navigation Aid for partially d...IJERA Editor
The FMBWCN Aid is a portable and wearable multi-purpose system for the partially disabled. The Aid is a
glove-based system in which different trained finger movements leads to different modes of operation of the
system such as APR Voice Module and Wheelchair Controller Module. The finger movements (bending
movement) leads to the flexion of the flex sensor attached to the glove. Flexion leads to change in resistance of
the flex sensors, which will be recorded via a microcontroller (Arduino Uno) and different sets of movement of
the fingers will lead to different modules of operation as specified in the default settings of the FMBWCN Aid.
Crystal Growth and Studies of Dihydrogen Phosphates of Potassium and Ammonium...IJERA Editor
A nonlinear optical (NLO) material Potassium dihydrogen phosphates (KDP) and Ammonium dihydrogen
phosphates (ADP) are grown by slow evaporation solution growth technique. The FTIR studies confirm the
presence of the functional group in the grown crystal. The optical transmittance studies show that the crystal has
transparence in the entire visible and IR region. The thermal stability of the materials was assessed by TG/DTA
analysis. The mechanical stability of the grown crystals was analyzed by Vicker’s microhardness test. The
dielectric behavior of the crystals was tested by dielectric analysis. The second harmonic generation (SHG) of
KDP is confirmed by Kurtz and Perry powder technique using Nd: YAG laser.
Influence of Combine Vertical Irregularities in the Response of Earthquake Re...IOSRJMCE
This document discusses the influence of vertical irregularities on the seismic response of reinforced concrete structures through nonlinear static (pushover) analysis. Five 17-story reinforced concrete building models with different vertical setback configurations are analyzed: one regular model and four models with increasing mass, stiffness and vertical setback irregularities. The results show that vertical irregularities reduce lateral load capacity and increase lateral displacement, base shear, and performance point compared to the regular structure. Plastic hinges form at different stages for each model based on their performance level. It is concluded that increasing vertical irregularities negatively impact seismic performance by decreasing flexural and shear strength demands.
Effect of Infill and Mass Irregularity on RC Building under Seismic LoadingIRJET Journal
The document summarizes a study on the effect of infill and mass irregularity on the seismic performance of reinforced concrete buildings. Nine building models were analyzed, including regular bare frame models and models with irregularities due to partial masonry infill or additional mass at certain floors. Response spectrum analysis was conducted on the models and responses like displacement, drift, overturning moment, shear force and stiffness were compared. The results showed that infill walls enhance seismic performance by reducing displacement and drift, while increasing stiffness, but cause higher forces. Mass irregularity increased displacement, drift and forces in intermediate floors but had little effect at the top and bottom. Irregular buildings generally performed poorer under seismic loading than the regular bare frame model.
Design And Analysis Of Precast Load Bearing Walls For Multi Storey Building ...IJMER
In the present scenario of construction industry, time of construction is very crucial factor.
Pre-cast construction is gaining significance in general and urban areas in particular. The precast
technology is a viable and alternative technique to reduce the construction time. G+11 storey live
project is taken for analysis and design with load bearing walls. Design of precast wall panels and
design of precast slabs is carried using Indian codes subjected to gravity and lateral loads (seismic and
wind). Connections of wall to wall, wall to slab and foundation beam to wall is designed. The structural
system consists of load bearing walls and one-way slabs for gravity and lateral loads have been taken
for analysis using ETABS. Various wall forces, displacements and moments have been worked out for
different load combinations. Data base is presented for the worst load combination
IRJET- Impact of Shear Wall to Reduce Torsional Effect for Unsymmetrical R.C....IRJET Journal
This document presents a study on analyzing the torsional effects on symmetrical and unsymmetrical reinforced concrete framed buildings under seismic loading. Time history analysis is performed on 10-storey symmetrical and L-shaped unsymmetrical buildings using MATLAB. The response quantities like base shear, displacement and torsional moment are obtained and compared for bare frame, frame with infill walls and frame with shear walls. The results show that the unsymmetrical bare frame experiences higher base shear, displacement and torsional moment compared to the symmetrical frame. Infill walls and shear walls are found to effectively reduce the torsional effects in the unsymmetrical building by shifting the center of rigidity closer to the center of mass.
IRJET- Retrofitting of Reinforced Concrete Frames using different X Braci...IRJET Journal
This document discusses retrofitting an existing reinforced concrete industrial building in seismic zone III of India using different X bracing configurations. The building is modeled in ETABS software and analyzed using equivalent static analysis both without bracing and with different X bracing configurations including alternate, corner, and middle bracing systems. Results are compared in terms of lateral displacement, story drift, bending moment, shear force, axial force, and story stiffness. It is found that lateral displacement and story drift are reduced the most, by around 75%, for the middle bracing configuration compared to the unbraced structure, indicating it provides the best seismic performance improvement through retrofitting.
Seismic performance of r c buildings on sloping grounds with different types ...eSAT Journals
Abstract
Structure are highly susceptible to serve damages in earthquake scenario, so choosing an appropriate lateral force resisting
bracing systems will have a significant effect on performance of the structure. So this present study is aimed at evaluating and
comparing various types of eccentric steel bracings for 12 storey RC frame building resisting on sloping ground configurations.
For this 5 types of bracing systems like X-Bracing, Diagonal bracing, K- bracing, V-bracing and inverted V bracing are
considered on the outer periphery of the buildings with step back and set back – step back type configurations are modeled and
analyzed. The models are compared for different aspects within the structure, such as the maximum storey displacement, base
shear, storey drift and storey shear, the structure is analyzed for seismic zone V and medium soil condition as per IS 1893:2002
using ETABS software. Results conclude that on sloping ground due to irregularity on ground surface, the structures are more
vulnerable to earthquakes. Hence use of eccentric steel bracing is an effective and economical way to resist earthquake forces,
Inverted V type bracing performs well compared to other bracing types. By using inverted V type bracing in step back buildings
types maximum storey displacement of 70% and storey drift of 66% are obtained. Similarly for setback – step back configuration
maximum storey displacement of 74% and storey drift of 70% are obtained respectively.
Keywords: X-Bracing, Diagonal Bracing, K- Bracing, V-Bracing and Inverted V Bracing
IRJET- Non Linear Static Analysis of Frame with and without InfillsIRJET Journal
This document analyzes the effect of masonry infill walls on the seismic performance of reinforced concrete frames through nonlinear static (pushover) analysis. A 4-story building located in seismic zone 2 of India was modeled in SAP2000 both with and without infill walls. Infill walls were modeled using equivalent compression struts. Results showed that the presence of infill walls increased the building's stiffness, base shear capacity, and changed the failure mechanism from a soft-story collapse to a truss action. Comparison of load-displacement curves and hinge formations indicated infill walls significantly improve the building's lateral resistance and shift plastic hinging to joints at the infill-frame interface.
IRJET- Seismic Analysis of Multi-Storied Building with Floating ColumnIRJET Journal
This document presents the results of a seismic analysis of multi-story buildings with floating columns located at the 8th story. Three building models were analyzed: a 12-story building, 14-story building, and 16-story building, all with plan dimensions of 21m x 21m. The buildings were analyzed for different seismic zones using ETABS software. The analysis found that lateral displacement and story drift increased from lower to higher seismic zones due to the increased ground motion. For some models and zones, displacement values exceeded permissible limits, requiring strengthening of structural members. In general, displacement was greater in the Y-direction than the X-direction. The presence of a floating column increased displacement and drift compared to buildings without floating columns,
Seismic Analysis of G 10 Storey Building with Various Locations of Shear Wall...ijtsrd
Shear walls are specially designed structural members provided in the multi storey buildings to resist lateral forces. These walls have very high in plane strength and stiffness, which can resist large horizontal forces and can support gravity loads. There are lots of literatures available to design and analyse the shear wall. Ravi Kumar Vishwakarma | Vipin Kumar Tiwari "Seismic Analysis of G+10 Storey Building with Various Locations of Shear Walls using Etabs" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd43646.pdf Paper URL: https://www.ijtsrd.comengineering/structural-engineering/43646/seismic-analysis-of-g10-storey-building-with-various-locations-of-shear-walls-using-etabs/ravi-kumar-vishwakarma
IRJET- Planning, Design & Analysis of a Commercial Building with Flat Sla...IRJET Journal
This document summarizes the planning, design, and analysis of a commercial building with flat slab structure considering earthquake forces using ETABS software. 25 models of multi-story reinforced concrete flat slab structures with varying aspect ratios and slenderness ratios were modeled and analyzed using response spectrum analysis. The objectives were to calculate design lateral forces, study structural response in seismic zone III, and determine limit aspect and slenderness ratios for structural safety and stability.
PLANNING AND DESIGN OF G+3 RESIDENTIAL HOUSING COMPLEX (Share By Suman Sau)Suman Sau
The document outlines the planning and design of a G+3 residential housing complex project. It discusses the objectives of designing a 17 unit apartment building with 3 stories using RCC framing. It describes the key elements of the complex like residential buildings, roads, school, and amenities. It also discusses the software used like AutoCAD and STAAD Pro, the methodology of selecting the site, creating master plans and designs, and analyzing the structure. Load cases, design of beams, columns, and slabs are also summarized.
IRJET- An Innovative Method of Electricity Generation from Speed-Breakers of ...IRJET Journal
This document summarizes research on analyzing the seismic performance of flat slab and flat plate buildings compared to conventional beam-column buildings. A 10-story building model is analyzed using ETABS software to study the effects of adding steel bracing or shear walls. Previous studies on using different bracing configurations, increasing building height, and replacing columns with shear walls are reviewed. The current study analyzes buildings with flat slabs or plates and variable stiffness by adding bracing or walls at different locations. Response parameters like displacement, drift, shear and period are compared to evaluate the performance of walls versus bracing in improving seismic resistance of flat slab structures.
IRJET- Seismic Analysis of Vertically Irregular RC Framed Structure using X- ...IRJET Journal
This document analyzes the seismic performance of a vertically irregular 20-story reinforced concrete framed structure with and without X-bracing and bundled tubes. The structure is analyzed using STAAD PRO software for zones III, IV, and V with hard soil. Results show that adding X-bracing and bundled tubes increases base shear by up to 45.5% and reduces displacement by up to 47.4%, indicating increased strength and stiffness. Maximum base shear and least displacement occurred in zone III, suggesting it provides the best seismic performance. Therefore, using X-bracing and bundled tubes can effectively resist lateral seismic forces in tall, vertically irregular structures.
This document analyzes the behavior of 20-story reinforced concrete I-shaped buildings located in different seismic zones, considering the effects of plan dimensions, seismic zone, and infill walls. It is observed that maximum story drift occurs in Zone V. The presence of infill walls reduces story drifts. Both design ultimate positive and negative moments in transfer girders and main beams decrease when infill wall effects are included. The response spectrum method predicts lower maximum story drift than the equivalent lateral force method in most cases.
This document provides guidelines for the design and construction of raft foundations. It discusses different types of raft foundations and factors to consider in the design such as allowable bearing pressure, depth of foundation, subsoil water pressure, properties of the supporting soil, rigidity of the foundation and superstructure, and methods of analysis. The main methods of analysis described are the conventional or rigid foundation method based on linear distribution of contact pressure, and simplified flexible foundation methods. Design parameters like modulus of elasticity and subgrade reaction are also addressed.
This document summarizes a thesis analyzing the seismic performance of a 13-story building model with and without shear walls. Two models are considered: a bare frame structure and a shear wall frame structure. Both models are analyzed using ETABS software under wind and earthquake loading conditions in Seismic Zone III. The results show that the shear wall structure performs much better in terms of limiting lateral displacement, storey drift, and increasing stiffness and strength. It is concluded that the shear wall frame structure provides more reliable performance against lateral loads.
IRJET- Static and Dynamic Analysis of Multistorey Buildings having Floating C...IRJET Journal
This document analyzes the behavior of multistory buildings with floating columns, which do not extend all the way from the top floor to the foundation. Three building models with 9, 12, and 15 stories are analyzed with and without shear walls using static and dynamic methods. The buildings are assumed to be located in seismic zones III, IV, and V. Response parameters of lateral displacement and story drift are compared. Results show that story drift and displacement increase with zone intensity and number of stories. Shear walls and dynamic analysis help reduce drift and displacement. Dynamic analysis provides more accurate results than static analysis. In conclusion, floating columns can increase vulnerability in earthquakes, but this can be mitigated with shear walls.
IRJET- Evaluation of R.C. Multi-Storey Building Response under the Effect of ...IRJET Journal
This document evaluates the response of a 12-story reinforced concrete building with and without considering soil-structure interaction (SSI). The building is modeled in ETABS and its raft foundation is modeled in SAFE. Results show that accounting for SSI (modeling the building on flexible soil springs) increases story drift ratios, displacements, and bending moments compared to fixed-base modeling. SSI has an unfavorable effect and should be considered in seismic design for more accurate response evaluation.
Finger Movement Based Wearable Communication & Navigation Aid for partially d...IJERA Editor
The FMBWCN Aid is a portable and wearable multi-purpose system for the partially disabled. The Aid is a
glove-based system in which different trained finger movements leads to different modes of operation of the
system such as APR Voice Module and Wheelchair Controller Module. The finger movements (bending
movement) leads to the flexion of the flex sensor attached to the glove. Flexion leads to change in resistance of
the flex sensors, which will be recorded via a microcontroller (Arduino Uno) and different sets of movement of
the fingers will lead to different modules of operation as specified in the default settings of the FMBWCN Aid.
Crystal Growth and Studies of Dihydrogen Phosphates of Potassium and Ammonium...IJERA Editor
A nonlinear optical (NLO) material Potassium dihydrogen phosphates (KDP) and Ammonium dihydrogen
phosphates (ADP) are grown by slow evaporation solution growth technique. The FTIR studies confirm the
presence of the functional group in the grown crystal. The optical transmittance studies show that the crystal has
transparence in the entire visible and IR region. The thermal stability of the materials was assessed by TG/DTA
analysis. The mechanical stability of the grown crystals was analyzed by Vicker’s microhardness test. The
dielectric behavior of the crystals was tested by dielectric analysis. The second harmonic generation (SHG) of
KDP is confirmed by Kurtz and Perry powder technique using Nd: YAG laser.
Trace Analysis of Driver Behavior on Traffic Violator by Using Big Data (Traf...IJERA Editor
This study aims to prove the effectiveness of traffic safety education program for traffic violators. Traffic
violators who finished the traffic safety education programs were tracked down. In order to analyze the
effectiveness of traffic safety education program, traffic violator’s data during ten-year period were used. This
study analyzed how traffic violators changed their attitudes about traffic law abidance. Also predicted social benefits from traffic
safety education program for traffic violators. Effectiveness of traffic accident prevention through traffic safety
education program is approximately 93%. In terms of social benefits, it shows more than $12 billion Even
though the effectiveness of traffic safety education program represents remarkable results, but this program is
made for traffic violators who have already committed traffic offenses in the past. So in order to prevent traffic
violations in advance, specific education program for potentially risky drivers is necessary.
Comparison of Cell formation techniques in Cellular manufacturing using three...IJERA Editor
This document compares three cell formation techniques for cellular manufacturing: Rank Order Clustering 2 (ROC-2), Direct Clustering Analysis (DCA), and Adaptive Resonance Theory (ART). It evaluates the performance of each using grouping efficiency and the number of exceptional elements. The key findings are that ART outperforms the other two techniques, providing faster computation and the ability to handle large industrial problems. ART is an artificial neural network approach that can dynamically adapt machine-part cells. The document concludes ART is an effective method for machine-part cell formation in cellular manufacturing.
Maximum PowerPoint Tracking of PV System Based on a SEPIC Converter Using Fuz...IJERA Editor
This paper presents the MPPT (Maximum power point tracking) operation of PV (Photovoltaic) system based
on a SEPIC (Single Ended Primary Inverter Converter) converter using fuzzy logic controller. MPPT method
such as Incremental conductance base on FLC (Fuzzy Logic Controller) is used to extract maximum output
power of the PV system. PV energy is the most essential energy resources since it is pollution free, clean and
endless. The FLC proposed scheme is interface with the MPPT to generate the PWM (Pulse Width Modulation)
for the SEPIC controller for maximum power point tracking operation.FLChas used Mamdani’s method for
convergent and divergent of membership function. FLC is used for more efficient performance under the
variation in different atmosphere. The fuzzy logic controller with SEPIC for MPPT scheme extract the
maximum power point tracking without any change in the voltage at the inverter at different load condition. The
behavior of the converter and controller tested in simulation at different operating conditions. Proposed scheme
is used for accurately tracking maximum point and also send the smooth, error free signal to the inverter.
Mechanical Properties of Concrete with Marine Sand as Partial Replacement of ...IJERA Editor
The process of depleting sources of natural aggregates challenges the production of technically and
environmentally adequate concrete. Alternative material from marine sources is good enough for the
replacement of fine aggregate in the concrete. The material was stockpiled in the open air and no washing,
drying or decontamination process was carried out. Physical and chemical properties of DMS material were
determined. All the materials used in the concrete were selected and tested as per the standard procedures of the
Indian standards. A unique design mix will be done based on the entire material test results. Different mixtures
were produced using DMS in different proportions from 15% to 100% as per the finalized trial of the design
mix. The concrete were submitted to compressive strength testsafter 7, 28 and 90 days of moist curing, as well
as flexure and splitting tensile strength tests for M-25 grade.
Machining of Aircraft Bearing Rings using High Quality Bearing SteelIJERA Editor
Bearing rings for Aircraft application are machined using high quality M50 High Speed Steel conforming to
AMS 6491B. The raw material for the rings of Ball bearing is prepared from a single bar stock using trepanning.
Special collet type soft jaw and Mandrels were devised and used on CNC Lathes to reduce manufacturing
problems like ovality. Raceway forms are turned using single point copy turning insert. The problems faced
during rings manufacture were discussed in this study.
Developing an Environmentally Sustainable Hot Mix Asphalt Using Recycled Conc...IJERA Editor
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc
PAVIMENTARÁN LA ZONA CENTRO DE ABASOLO
Como parte de la jornada “En un Día 100 Obras Más”
Abasolo, Coahuila de Zaragoza; 06 de noviembre de 2015.- Con una inversión de 260 mil pesos, el Gobierno del Estado pavimentará la calle J.O. de Domínguez, en la Zona Centro de este municipio, obra que beneficiará a los habitantes de esta comunidad de la región Centro-Desierto.
This document provides guidance for an OSPE (objective structured practical examination) covering various stations involving pathology, anatomy, pharmacology, and clinical scenarios. It emphasizes key topics to study from slides and labs and provides examples of questions and answers for some stations. These include identifying cancer types, prescribing antibiotics, acid-base balance questions, and calculating fluid deficits and treatments. The document stresses memorizing important details from course materials to perform well on an OSPE requiring quick recall and application of knowledge.
El documento describe 8 beneficios del té verde, incluyendo que previene las arrugas al humectar la piel, reduce el riesgo de artritis al contener antioxidantes, fortalece los huesos al aumentar la densidad ósea, y ayuda a bajar el colesterol malo al limitar la absorción de grasas. Cada sección proporciona detalles sobre estudios científicos que respaldan cada beneficio y recomendaciones sobre el consumo de té verde.
Национального Круглого стола, посвященного подведению итогов по 1-му проекту ИККО в сети «Жанырык» : «Усиление потенциала родителей детей с ограниченными возможностями» проводимого в партнерстве с МТСР КР. (АРДИ, Нур бала и Семья каждому ребенку)
FEA based Dissipation Energy and Temperature Distribution of Rubber BushingIJERA Editor
The document describes a finite element analysis of the dissipation energy and temperature distribution in rubber bushings. It begins with an introduction to rubber bushings and how the heat generated from their viscoelastic damping can lead to degradation over time. It then outlines the development of a finite element method to model viscoelastic structures and calculate their dissipation energy based on strain and stress. The method is applied to analyze how the dissipation energy density and temperature distribution in a rubber bushing core vary with excitation frequency and amplitude. Experimental dynamic testing is also conducted to evaluate the simulation results.
Transient Stability Analysis of IEEE 9 Bus System in Power World SimulatorIJERA Editor
It is widely accepted that transient stability is an important aspect in designing and upgrading electric power
system.
The objective of this paper was to investigate and understand the stability of power system
In this paper, modelling and transient stability analysis of IEEE 9 bus system was performed using POWER
WORLD SIMULATOR. The load flow studies were performed to determine pre-fault conditions in the system
using Newton-Raphson method. With the help of three-phase balanced fault, the variations in power angle and
frequency of the system were studied. Frequency is a reliable indicator if deficiency condition in the power
systems exists or not. For three-phase balanced fault, fast fault clearing time was analysed to bring back the
system to the stability. Further, comparison between Runga method and Euler method for better results was
performed. Hence, impact of load switching on system was also computed so as to bring system to steady state.
Studying nanotube-based oscillators and their application as memory cells via...IJERA Editor
A nanoscale continuum model of carbon nanotube-based oscillators is proposed in this paper. In the continuum
model, the nanotube is discretized via the meshfree particle method. The atomistic interlayer interaction between
the outer and inner tubes is approximated by the interlayer interaction between particles. The mechanical
behaviors of oscillators are studied and compared well with molecular dynamics simulation results. The
nanotube-based oscillator can be employed to design a nanoelectromechanical system. In this system, two
electrodes are attached on the top of the outer tube so that the induced electromagnetic force can overcome the
interlayer friction. The mechanisms of such nanoelectromechanical systems as memory cells are also considered.
Interference Minimization Protocol in Heterogeneous Wireless Sensor Network f...IJERA Editor
1) The document describes a proposed Interference Minimization Protocol (IMP) for heterogeneous wireless sensor networks (HTWSNs) to improve quality of data transmission. 2) HTWSNs experience interference during data transmission that degrades quality, and IMP aims to minimize this interference by estimating link capacities and identifying high interference areas. 3) Simulation results show that IMP reduces interference and energy consumption compared to not using the protocol, especially with multiple events occurring simultaneously in the network.
Investigation of Significant Process Parameter in Manganese Phosphating of Pi...IJERA Editor
The aim of this study is to determine the most significant parameter such as phosphating bath temperature,
phosphating time,accelerator level on the fatigue life of piston pin material such as 40NiCr4Mo3 by analysis of
variance (ANOVA).The selected three imput parameters were studied at three different level by conducting nine
experiments based on L9 orthogonal array of Taguchi’s methodology.Phosphating bath temperature has
significant effect on fatigue strength followed by phosphating time and accelerator level.
Strategies of detecting Profile-injection attacks in E-Commerce Recommender S...IJERA Editor
E-commerce recommender systems are vulnerable to different types of shilling attack where the attacker influences the
recommendation procedure in favor of him by inserting fake user-profiles into the system. From one point of view, the
attacks can be of type push or nuke-either to promote or to demote a product. On the other hand, attacks can be classified as
high-knowledge or low-knowledge attack depending on the amount of system knowledge required for making the attack
successful. Several research works have been done in the last two decades for defending attacks on recommender systems. In
this paper, we have surveyed the major works done in this area by different researchers. After a brief explanation of different
attack types and attack models, we discussed the attack detection strategies proposed by the researchers mainly under five
categories- Generic and model specific attribute based, rating distribution based, outlier analysis based, statistical approach
based and clustering based.
Review of Jobran Khalil Jobran's works from Romantic FeaturesIJERA Editor
Jobran Khalil Jobran great immigrant writer and poet have been known with different view of his contemporary
to romantic poetry text format and reflective language of his time. This great poet had a wonderful impression
in new Arab literature and this caused the creation of a special style which at that time address the entity and
existence by mysticism and kind of intuition retrieved from its receiver view in solution of social ,emotional
and religious situation, as he shined with his myth and other great works. The aim of this article is that the
romantic feature of his works and elegance lyrics was investigated from different view of critics, and that
influence is the presence of woman, especially his mother in his romantic phenomena. This is a propellant and
different factor that we cannot neglect it according to the strategic important impact has had on his careers and
creation of a his world style. Social and environmental conditions changed the route of his career. These
conditions affected him and inevitably reflected them in his poem. If conditions are suitable, the feeling
manifested and appears and the talent shows off in the best way.
A mathematical modeling proposal for a Multiple Tasks Periodic Capacitated Ar...IJERA Editor
The countless accidents and incidents occurred at dams at the last years, propelled the development of politics
related with dams safety. One of the strategies is related to the plan for instrumentation and monitoring of dams.
The monitoring demands from the technical team the reading of the auscultation data, in order to periodically
monitor the dam. The monitoring plan of the dam can be modeled as a problem of mathematical program of the
periodical capacitated arcs routing program (PCARP). The PCARP is considered as a generalization of the
classic problem of routing in capacitated arcs (CARP) due to two characteristics: 1) Planning period larger than
a time unity, as that vehicle make several travels and; 2) frequency of associated visits to the arcs to be serviced
over the planning horizon. For the dam's monitoring problem studied in this work, the frequent visits, along the
time horizon, it is not associated to the arc, but to the instrument with which is intended to collect the data.
Shows a new problem of Multiple tasks Periodic Capacitated Arc Routing Problem and its elaboration as an
exact mathematical model. The new main characteristics presented are: multiple tasks to be performed on each
edge or edges; different frequencies to accomplish each of the tasks; heterogeneous fleet; and flexibility for
more than one vehicle passing through the same edge at the same day. The mathematical model was
implemented and examples were generated randomly for the proposed model's validation.
Seismic Performance of Flat Slab Structures Under Static and Dynamic LoadsIRJET Journal
This document presents research on analyzing the seismic performance of flat slab structures under static and dynamic loads. Models of flat slab structures with varying lateral stiffness were created, from flexible columns only to stiffer combinations of columns and shear walls. The models were subjected to seismic and dynamic loads, and the structural responses like natural periods, base shear, displacement, and inter-story drift were studied. The results showed that providing edge beams and shear walls strengthened flat slab structures seismically. Key aspects analyzed included the natural period, base shear, displacement, and inter-story drift of flat plate and flat slab structures with different configurations, under static and dynamic seismic loads.
COMPARATIVE STUDY ON SEISMIC ANALYSIS OF CONVENTIONAL SLAB AND FLAT SLAB STRU...IRJET Journal
This document presents a comparative study on the seismic analysis of conventional slab and flat slab structures with and without shear walls using ETABS software. A 12-story building model with a conventional slab, flat slab without shear walls, and flat slab with shear walls at corners is created. The buildings are analyzed for different seismic zones and soil types according to Indian standards. Results for parameters like story displacement, story drift, story stiffness, and natural period are presented in graphs for each model and seismic zone using both the equivalent static method and response spectrum method. The study found that the flat slab structure with shear walls performed best with lower displacement, drift, and higher stiffness. Increasing the seismic zone was found to increase displacement and drift while keeping stiffness
BEHAVIOUR OF G+10 BUILDING WITH SHEAR-WALLS AT DIFFERENT POSITIONSIRJET Journal
This document analyzes the behavior of a G+10 building with shear walls placed in different positions through modeling and analysis in ETABS software. Six different models are created with shear walls placed: 1) without shear walls, 2) at the building center around the lift cores, 3) along the building periphery, 4) at the building corners, 5) along both longitudinal faces and around lift cores, and 6) along both lateral faces and around lift cores. The models are analyzed and results such as story displacements, drift, and shear are compared. Placing shear walls at the building corners (Model 5) provides about a 90% reduction in maximum story displacement, making it the most efficient configuration for resisting seismic forces.
STUDY OF COMPARISON BETWEEN TWO ATRIUM BUILDINGS IN VARIOUS SEISMIC ZONES WIT...IRJET Journal
The document compares two 9-story atrium buildings with and without shear walls under different seismic zones. Model 1 does not include shear walls, while Model 2 includes shear walls at each corner. Both models are subjected to dead, live, wind and seismic loads based on Indian codes. Results show that the inclusion of shear walls significantly reduces maximum nodal displacement and bending moment. Across seismic Zones II through V, the building with shear walls experienced 25-40mm lower displacement and 275-372kN lower bending moment compared to the building without shear walls. Including appropriately placed shear walls improves the stability, stiffness and seismic performance of high-rise buildings.
Analysis of High Rise Multistoried Building With and without Shear Wall By Re...IRJET Journal
This document analyzes a 15-story residential building with and without shear walls using response spectrum analysis. It finds that placing symmetrically positioned shear walls improves the building's performance in terms of seismic parameters like story drift, displacement, forces and stiffness compared to a building without shear walls. The building is modeled in ETABS software and seismic parameters are compared for models with and without shear walls in zone 3. Results show that shear walls enhance the building's lateral stiffness and resistance to earthquake forces.
Study of Seismic Performance of RC Building with Flat Plate Influenced by Con...IRJET Journal
This document summarizes a study on the seismic performance of a 10-story reinforced concrete building with a flat plate influenced by concrete shear walls. The building was analyzed using ETABS software with the shear wall located at different positions. Results show that with a shear wall, time period and displacements decrease while base shear and stiffness increase, improving seismic performance. Maximum story drift is lowest when the shear wall is at the mid-length along the X-direction. In conclusion, a flat plate building requires shear walls to resist lateral loads during earthquakes in order to control deformations and prevent failure.
IRJET- Design of Earthquake Resistant Structure of Multi-Story RCC BuildingIRJET Journal
This document describes the design of an earthquake resistant G+21 multi-story reinforced concrete building using ETABS software. Key aspects analyzed include seismic analysis using equivalent static, response spectrum, and time history methods per Indian codes. The building is located in Lucknow, India which is a moderate seismic zone. Structural elements like beams, columns, slabs, and foundations are designed according to Indian standards. Analysis considers effects of earthquakes and other lateral loads. The building plan and frame layout are presented along with design assumptions.
IRJET- Effective Location of Shear Wall on Performance of Building Frame ...IRJET Journal
1. The document analyzes the effect of shear wall placement on the seismic performance of 10-story buildings.
2. Four building models are considered - without shear walls, with shear walls at corners, with shear walls at centers, and with a box-type shear wall at the center.
3. Analysis of story drift, displacement, shear and overturning moment shows that buildings with centrally located shear walls perform best under seismic loads.
Behaviour of Flat Slab by Varying Stiffness in High Seismic ZoneIRJET Journal
This document summarizes a study on analyzing the behavior of flat slab structures with varying stiffness in high seismic zones. Various flat plate and flat slab models with different configurations of shear walls and steel bracings were analyzed using ETABS software for 10, 15, and 20-story buildings. The models were subjected to dead, live, and earthquake loads as per Indian codes. Key parameters like natural period, base shear, storey displacement, and drift were compared. Results show that shear walls are more effective than steel bracings at reducing displacements. Flat slab models with shear walls at the core and periphery performed best with minimum displacement and drift. Increasing the height of buildings leads to higher displacements indicating the need for shear walls
IRJET- A Study on Seismic Analysis of RC Framed Structures on Varying Slo...IRJET Journal
This document presents a study on the seismic analysis of reinforced concrete framed structures located on varying slope angles, with and without shear walls. 12 models of a 10-story building were developed with slope angles of 0°, 11.25°, 22.5°, and 45° to analyze seismic performance. The models were analyzed using ETABS software for equivalent static and response spectrum analysis according to Indian seismic codes. Results for parameters like base shear, story shear, story displacement, and story drift were obtained and compared for models with shear walls at corners, corners and edges, and without shear walls. In general, models with shear walls performed better in reducing seismic demands.
IRJET- Seismic Response of Flat Slab Buildings with Shear WallIRJET Journal
This document presents a study on the seismic response of flat slab buildings with shear walls. Response spectrum analysis and pushover analysis were conducted on flat slab building models and regular framed building models using ETABS software. The results show that flat slab buildings have higher displacement and lower base shear capacity compared to regular framed buildings. However, the addition of shear walls improves the seismic performance of flat slab buildings. Specifically, a flat slab building with a shear wall at its core location performed best with the lowest displacement, while exterior and interior shear wall locations had progressively higher displacement. Both linear and nonlinear analysis confirmed that shear walls increase the strength and seismic resistance of flat slab structures.
IRJET- Comparative Analysis of Seismic Performance of R.C Building Restin...IRJET Journal
This document presents a comparative analysis of the seismic performance of reinforced concrete buildings resting on plain ground versus sloping ground at various inclinations. Four analytical building models were created and analyzed using finite element software: a building on plain ground, and buildings on ground sloping at 15, 25, and 35 degrees. The models were 7 stories tall with the same structural properties. Dynamic analysis results showed increased modal periods, story drifts, and displacements for buildings on steeper slopes, indicating worse performance. Buildings on 25 and 35 degree slopes in particular experienced sudden stiffness changes and highest displacements. The 35 degree slope building performed worst. In general, seismic performance decreased with increasing slope inclination.
IRJET- Performance of Flat Slabs and Flat Plates in High Seismic Zone with Va...IRJET Journal
This document analyzes the seismic performance of flat plate and flat slab structures with varying stiffness. Four models are considered: flat plate with shear walls, flat plate with bracing, flat slab with shear walls, and flat slab with bracing. The structures are analyzed using ETABS software to determine parameters like story displacement, drift, and base shear. The results show that under equivalent static analysis and response spectrum analysis, the flat slab with shear walls performs better than the other models, with minimum displacement and drift. In conclusion, the flat slab with shear walls provides better seismic performance for high seismic zones compared to the other structural configurations analyzed.
COMPARATIVE SEISMIC ANALYSIS OF A MULTI-STOREY RCC STRUCTURE WITH & WITHOUT F...IRJET Journal
This document discusses a comparative seismic analysis of a multi-storey reinforced concrete structure with and without floating columns located in seismic Zone IV, using computer software ETABS. Four cases are analyzed: Case 1 with no floating columns, and Cases 2-4 with floating columns at different locations on the ground floor. Parameters compared include storey drift, displacement, and shear. Results show that the presence of floating columns increases storey drift and displacement due to discontinuity in load transfer, with interior floating columns performing better than exterior columns. The study seeks to evaluate the impact of floating columns on the structure's seismic performance and response.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
IRJET- Performance of Multi-Story RCC Structure with Floating ColumnIRJET Journal
This document summarizes a research paper that analyzed the performance of multi-story reinforced concrete (RCC) structures with floating columns. The researchers used ETABS software to model a 10-story building and compare the results of conventional linear static analysis to sequential construction analysis. They found that sequential construction analysis, which applies loads stage-by-stage as construction progresses, produced higher deformations, bending moments, and shear forces in the transfer beams supporting floating columns compared to conventional analysis. Deformations were 43-59% higher with sequential analysis. Bending moments and shear forces also increased more for floating columns located at building corners compared to the middle. The researchers concluded floating column structures require sequential construction analysis to accurately capture their behavior.
IRJET- Earthquake Resistance Design of Open Ground Story BuildingIRJET Journal
1) The document analyzes the seismic behavior and earthquake resistance design of buildings with an open ground story (OGS). OGS buildings are vulnerable in earthquakes due to the lack of infill walls on the ground floor.
2) Finite element software SAP2000 is used to model OGS buildings of varying heights (G+8, G+10, G+12, G+16) both with and without equivalent diagonal struts to represent infill walls. The models are analyzed using pushover analysis.
3) Previous studies have found that assuming a multiplication factor of 2.5 for design forces in ground floor columns and beams, as permitted in codes, overestimates the required forces, especially for
Static and Dynamic Behavior of Reinforced Concrete Framed Building: A Compara...IOSR Journals
Reinforced concrete frame buildings are most common type of construction in urban India, which is subjected to several types of forces during their life time such as static forces and dynamic forces due to wind and earthquakes. The static loads are constant with time, while dynamic loads are time varying, causing considerable inertia effects .It depends mainly on location of building, importance of its use and size of the building. Its consideration in analysis makes the solution more complicated and time consuming and its negligence may sometimes becomes the cause of disaster during earthquake.
So it is growing interest in the process of designing civil engineering structures capable to withstand dynamic loads . The behavior of building under dynamic forces depends upon its mass and stiffness properties, whereas the static behavior is solely dependent upon the stiffness characteristics.
IRJET - A Review of Seismic Analysis of Circular Shape RC Building by using S...IRJET Journal
This document reviews seismic analysis of circular reinforced concrete (RC) buildings with shear walls in different positions. It discusses two types of circular buildings - with and without interior courtyards. Several past studies analyzing RC buildings with shear walls in different positions using software like ETABS, SAP2000, and STAAD-Pro are summarized. The studies conclude that zigzag and diagonal shear wall configurations provide better seismic performance than other configurations. Placing shear walls in the building center is ideal but often impractical, so ends are commonly used. Circular buildings experience less wind effects than other shapes.
Performance of RC Frame Structure with Floating Column and Soft Storey in Dif...IRJET Journal
This document presents the results of a pushover analysis conducted on four reinforced concrete (RC) frame building models to study the effects of a floating column and soft story in different earthquake zones. The models included regular buildings without and with a floating column, and irregular buildings without and with a floating column. The pushover analysis was performed according to Indian standards for earthquake loading. The analysis found that buildings with a floating column experienced higher displacements, drifts, and lower base shears compared to buildings without a floating column. Buildings in Zone V, which has higher seismicity, experienced higher displacements and drifts than those in Zone II. The first story of buildings with a soft story experienced drifts 45-50% greater than
Similar to Seismic Drift Control in soft storied RCC buildings (20)
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...IJECEIAES
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Seismic Drift Control in soft storied RCC buildings
1. M.P. Mishra Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 12, (Part - 2) December 2015, pp.41-48
www.ijera.com 41|P a g e
Seismic Drift Control in soft storied RCC buildings
M.P. Mishra¹, Dr.S.K.Dubey²
¹Ph.D. Scholar Maulana Azad National Institute of Technology, Bhopal (MP)
²Professor Dept. of Structural Engineering, Maulana Azad National Institute of Technology, Bhopal (MP)
ABSTRACT
This paper studies Seismic drift demands in RCC Buildings with weak first stories which is very important
seeing the present damages all over the World due to earth quake like Kobe and Chi-Chi earth quakes in
1995and 1999 respectively . As we know that in India , Bhuj-Gujrat earth quake on 26th
Jan 2001 and Nepal
earth quake -2015, were the most destructive events recorded in India and Nepal in terms of deaths and
damages to the infrastructure and devastation in the last fifty years., These earthquakes has provides lessons to
human society particularly engineers, architects, builders for improving design and planning, practices
,inadequate analysis, design deficiency and even poor quality of construction. It has been observed that the
principal reason of failure may be associated to soft stories, floating columns ,mass irregularities and pounding
of adjacent structures etc. In this paper focus has been to judge the damages factors which are responsible for
the collapse of structure and control measures to be provided for a safe and economic design as per current
Indian and foreign codes .An analysis has performed using STAAD-Pro for G+5 multistoried building in
different Zones IV and V and drifting results obtained has discussed with respect to safety and damages
consideration..
Keywords-: Ductility demand, Inter storey drift, mode shape, soft storey, stiffness.
I. INTRODUCTION
RCC Multistoried building is the most common
type of construction practices adopted in many
countries ranges G + 5 to G + 10 storey height .The
building framing system is generally moment
resisting consisting reinforced concrete slab casted
monolithically with beams and columns on shallow
isolated footings .The upper floor generally
constructed with infill walls made of unreinforced
bricks ,cut stone , or cement concrete blocks. In the
major cities, the ground floor/ basement is often used
for commercial and parking purposes, where the
infill walls are omitted resulting in soft or weak
stories. It is also seen that most of the building have
overhanging covered balconies on higher floors
.Sometimes Architect often erects a heavy beam
from the exterior columns of the building to the end
of the balcony on the first floor onwards to allow
more parking so a peripheral beam is provided at
the end of the erected girder. Thus the infill walls
which are present in upper floors and absent in
ground floor, creates a floating box type situation
and during earth quake these type of buildings
vibrates in torsion mode which is undesirable.
1.1 Causes of damages in RCC building
In past earthquake , it is found that there were
many causes of building collapse responsible for
multiple damages . So it is very difficult to classify
damages reasons in term of quantitative manner or
percentage wise . but the principle causes of damages
of buildings are soft storey ,floating columns ,mass
irregularities, poor quality of material , inconsistent
seismic performances ,soil and foundation effects,
inadequate ductile detailing in structural components
etc .So bureau of Indian standard (BIS ) has
published two codes IS-1893-PART-2002 and IS-
13920-1993 for the earth quake resistant design of
RCC buildings .the former codes deals with the
determination of forces and general considerations of
design of buildings and latter code deals with the
detailing of RCC structures for ductility
requirements. So building should be designed on the
basis of above code requirements and building with
vertical irregularities like soft storey etc should be
designed on the basis of dynamic analysis and
inelastic design with greater quality of construction.
1.2 Soft storey failure
we know that multistoried buildings in
Metropolitan cities require open taller first storey for
parking of vehicles and for retail shopping or
banking hall etc owing to the lack of horizontal
space and high cost .thus due to the functional
requirement, the first storey has lesser strength and
stiffness as compared to the upper stories which are
stiffened by masonry infill walls .This character of
building creates weak storey problem in multistory
building. So increased flexibility of the first storey
results in extreme deflection which in turn lead to
concentration of forces at the second connection
accompanied by large plastic deformation..In
addition most of the energy developed during the
RESEARCH ARTICLE OPEN ACCESS
2. M.P. Mishra Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 12, (Part - 2) December 2015, pp.41-48
www.ijera.com 42|P a g e
earthquake is dissipated by columns which
transform the soft storey into a mechanism .In such
cases the collapse is unavoidable. Therefore a soft
storey desire a special consideration in analysis and
design It has been observed from the survey that the
damage is due to collapse and buckling of columns
especially where parking places are not covered
appropriately . On the contrary the damages is
reduced considerably where the parking places are
covered adequately It is recognized that this type of
failure results ifrom combination of several other
unfavourable reasons such as torsion ,excessive mass
on the upper floors, P-Delta effects, and lack of
ductility in the bottom storey.
II. Geometry and description of model
In the present work, a six storied (G+5) RC
frame building is being modeled using computer
software STAD-Pro-V8I having storey height 3.6m
for each floor with regular plan , building consist
five bays in X-direction and nine bays in Y-direction
with plan 45 m by 30m having foundation depth
2.4m. the bay width along longitudinal direction is
6.00m and in transverse direction is 5.00m with a
column size 0.30mby 0.6 for all the storey and the
total height of building is 21.60m..M-25 Grade of
concrete With Fe-415 grade of steel is being used
for all types of modeling in this study and loading
has considered as as IS-875-1987-Part-05 and part -2
and calculation of base shear force etc as per IS-
1983-2002-Part-1 with medium type of soil in
different zones.
III. Base shear force
We know that as per IS 1893-2002 part-1, the
total design lateral force or design seismic base shear
(Vb) along any principal direction will be Vb
=AhxW (1) Where ,Ah = design horizontal
acceleration spectrum, W=seismic weight of the
building . Ah=Z/2x I/R x Sa/g …(11), where
Z=zone factor varies from 0.1 to 0.36, I=importance
factor, R=response reduction factor, Sa/g=average
response acceleration coefficient.the vertical
distribution of base shear force to different floors:.
Qi = Vb. x Wihi
2
/∑Wihi
2
... (111) Where Qi =
Design lateral force at floor I, Wi = seismic wt. of
floor I, Hi = height of floor measured from base ,n=
no of stories in the building including certain
approximation and assumption as per earth quake
codes with amendments.
IV. Result and discussion
Response spectrum analysis has been done
using the above parameters for different zones and
the post processing results obtained has summarized
in the following tables and figures for structure and
the average displacement and inter storey drift for
different zones has summarized as below.
Table No. 4.1 AVERAGE DISPLACEMENT & INTER STOREY DRIFT (ZONE-IV)
STORY HEIGHT LOAD AVG. DISP (CM) DRIFT (CM) REMARK
(METE) X Z X Z
1.000 0.000 REX 0.000 0.000 0.000 0.000
REZ 0.000 0.000 0.000 0.000
2.000 2.400 REX 0.414 0.000 0.414 0.000
REZ 0.000 0.834 0.000 0.834
3.000 6.000 REX 1.791 0.001 1.377 0.001 WITHIN PERMISSIBLE LIMIT
REZ 0.000 3.574 0.000 2.739 EXCEEDS PERMISSIBLE LIMIT
4.000 9.600 REX 3.223 0.001 1.433 0.001 WITHIN PERMISSIBLE LIMIT
REZ 0.001 6.200 0.000 2.626 EXCEEDS PERMISSIBLE LIMIT
5.000 13.200 REX 4.489 0.002 1.265 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 8.473 0.000 2.273 EXCEEDS PERMISSIBLE LIMIT
6.000 16.800 REX 5.492 0.002 1.003 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 10.257 0.000 1.784 EXCEEDS PERMISSIBLE LIMIT
7.000 20.400 REX 6.173 0.002 0.681 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 11.447 0.000 1.190 WITHIN PERMISSIBLE LIMIT
8.000 24.000 REX 6.522 0.002 0.350 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 11.992 0.000 0.545 WITHIN PERMISSIBLE LIMIT
Average Displacement and interstorey drift calculation for a bare frame
3. M.P. Mishra Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 12, (Part - 2) December 2015, pp.41-48
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Table No. 4.2 AVERAGE DISPLACEMENT & INTER STOREY DRIFT (ZONE-V)
STORY HEIGHT LOAD AVG. DISP (CM) DRIFT (CM) REMARK
(METE) X Z X Z
1 0 REX 0 0 0 0
REZ 0 0 0 0
2 2.4 REX 0.6207 0.0003 0.6207 0.0003
REZ 0.0001 1.2513 0.0001 1.2513
3 6 REX 2.6859 0.001 2.0652 0.0008 EXCEEDS PERMISSIBLE LIMIT
REZ 0.0004 5.3604 0.0003 4.1091 EXCEEDS PERMISSIBLE LIMIT
4 9.6 REX 4.8351 0.0018 2.1493 0.0008 EXCEEDS PERMISSIBLE LIMIT
REZ 0.0007 9.2997 0.0003 3.9394 EXCEEDS PERMISSIBLE LIMIT
5 13.2 REX 6.7328 0.0025 1.8977 0.0007 EXCEEDS PERMISSIBLE LIMIT
REZ 0.001 12.7098 0.0002 3.4101 EXCEEDS PERMISSIBLE LIMIT
6 16.8 REX 8.2374 0.003 1.5046 0.0005 EXCEEDS PERMISSIBLE LIMIT
REZ 0.0012 15.386 0.0002 2.6762 EXCEEDS PERMISSIBLE LIMIT
7 20.4 REX 9.2589 0.0034 1.0215 0.0004 WITHIN PERMISSIBLE LIMIT
REZ 0.0013 17.171 0.0001 1.785 EXCEEDS PERMISSIBLE LIMIT
8 24 REX 9.7831 0.0033 0.5242 0 WITHIN PERMISSIBLE LIMIT
REZ 0.0012 17.988 0 0.817 WITHIN PERMISSIBLE LIMIT
Average Displacement and interstorey drift calculation for a bare frame
Table No. 4.3 AVERAGE DISPLACEMENT & INTER STOREY DRIFT (ZONE-IV)
STORY HEIGHT LOAD AVG. DISP (CM) DRIFT (CM) REMARK
(METE) X Z X Z
1.000 0.000 REX 0.000 0.000 0.000 0.000
REZ 0.000 0.000 0.000 0.000
2.000 2.400 REX 0.521 0.000 0.625 0.000
REZ 0.000 01.251 0.000 .0.989
3.000 6.000 REX 5.4029 0.0023 2.897 0.0021 EXCEEDS PERMISSIBLE LIMIT
REZ 0.000 8.504 0.000 8.551 EXCEEDS PERMISSIBLE LIMIT
4.000 9.600 REX 3.523 0.001 1.449 0.002 WITHIN PERMISSIBLE LIMIT
REZ 0.001 6.300 0.000 2.7626 EXCEEDS PERMISSIBLE LIMIT
5.000 13.200 REX 4.489 0.002 1.265 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 8.473 0.000 2.273 EXCEEDS PERMISSIBLE LIMIT
6.000 16.800 REX 5.492 0.002 1.003 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 10.257 0.000 1.784 EXCEEDS PERMISSIBLE LIMIT
7.000 20.400 REX 6.173 0.002 0.681 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 11.457 0.000 1.190 WITHIN PERMISSIBLE LIMIT
8.000 24.000 REX 6.522 0.002 0.350 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 12.992 0.000 0.545 WITHIN PERMISSIBLE LIMIT
Average Displacement and interstorey drift calculation for a soft storied at GF
4. M.P. Mishra Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 12, (Part - 2) December 2015, pp.41-48
www.ijera.com 44|P a g e
Table No. 4.4 AVERAGE DISPLACEMENT & INTER STOREY DRIFT (ZONE-V)
STORY HEIGHT LOAD AVG. DISP (CM) DRIFT (CM) REMARK
(METE) X Z X Z
1 0 REX 0 0 0 0
REZ 0 0 0 0
2 2.4 REX 1.9207 0.0003 1.9120 0.0003
REZ 0.0003 1.7513 0.0001 1.7513
3 6 REX 7.894 0.003 8.735 0.0099 EXCEEDS PERMISSIBLE LIMIT
REZ 0.0066 9.989 0.0008 10.7893 EXCEEDS PERMISSIBLE LIMIT
4 9.6 REX 4.8351 0.0018 2.1493 0.0008 EXCEEDS PERMISSIBLE LIMIT
REZ 0.0007 9.2997 0.0003 3.9394 EXCEEDS PERMISSIBLE LIMIT
5 13.2 REX 6.7328 0.0025 1.8977 0.0007 EXCEEDS PERMISSIBLE LIMIT
REZ 0.001 12.7098 0.0002 3.4201 EXCEEDS PERMISSIBLE LIMIT
6 16.8 REX 8.2374 0.003 1.5046 0.0005 EXCEEDS PERMISSIBLE LIMIT
REZ 0.0012 15.387 0.0002 2.6762 EXCEEDS PERMISSIBLE LIMIT
7 20.4 REX 9.2589 0.0034 1.0215 0.0004 WITHIN PERMISSIBLE LIMIT
REZ 0.0013 17.271 0.0001 1.785 EXCEEDS PERMISSIBLE LIMIT
8 24 REX 9.7831 0.0033 0.5242 0 WITHIN PERMISSIBLE LIMIT
REZ 0.0012 18.988 0 0.837 WITHIN PERMISSIBLE LIMIT
Average Displacement and interstorey drift calculation for a soft storied at GF
Table No. 4.5 AVERAGE DISPLACEMENT & INTER STOREY DRIFT (ZONE-IV)
STORY HEIGHT LOAD AVG. DISP (CM) DRIFT (CM) REMARK
(METE) X Z X Z
1.000 0.000 REX 0.000 0.000 0.000 0.000
REZ 0.000 0.000 0.000 0.000
2.000 2.400 REX 0.414 0.000 0.414 0.000
REZ 0.000 0.834 0.000 0.834
3.000 6.000 REX 4.118 0.001 6.477 0.001 WITHIN PERMISSIBLE LIMIT
REZ 0.000 6.574 0.004 4.739 EXCEEDS PERMISSIBLE LIMIT
4.000 9.600 REX 3.223 0.001 1.433 0.001 WITHIN PERMISSIBLE LIMIT
REZ 0.001 6.200 0.000 2.626 EXCEEDS PERMISSIBLE LIMIT
5.000 13.200 REX 4.489 0.002 1.265 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 8.473 0.000 2.273 EXCEEDS PERMISSIBLE LIMIT
6.000 16.800 REX 5.492 0.002 1.003 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 10.357 0.000 1.784 EXCEEDS PERMISSIBLE LIMIT
7.000 20.400 REX 6.173 0.002 0.681 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 11.447 0.000 1.390 WITHIN PERMISSIBLE LIMIT
8.000 24.000 REX 6.522 0.002 0.350 0.000 WITHIN PERMISSIBLE LIMIT
REZ 0.001 11.998 0.000 0645 WITHIN PERMISSIBLE LIMIT
Average Displacement and interstorey drift calculation for a bare frame with shear wall at core And enlarging
sizes GF columns nearly 20 percentage with respect to IInd floor and above
5. M.P. Mishra Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 12, (Part - 2) December 2015, pp.41-48
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Table No. 4.6 AVERAGE DISPLACEMENT & INTER STOREY DRIFT (ZONE-V)
STORY HEIGHT LOAD AVG. DISP (CM) DRIFT (CM) REMARK
(METE) X Z X Z
1 0 REX 0 0 0 0
REZ 0 0 0 0
2 2.4 REX 1.207 0.0003 0. 907 0.0003
REZ 0.0001 1.4513 0.0001 1.4513
3 6 REX 6.6859 0.002 2.0652 0.0096 EXCEEDS PERMISSIBLE LIMIT
REZ 0.0056 7.3604 0.0003 7.2091 EXCEEDS PERMISSIBLE LIMIT
4 9.6 REX 4.8351 0.0018 2.1493 0.0008 EXCEEDS PERMISSIBLE LIMIT
REZ 0.0007 9.2997 0.0003 3.9394 EXCEEDS PERMISSIBLE LIMIT
5 13.2 REX 6.7328 0.0025 1.8977 0.0007 EXCEEDS PERMISSIBLE LIMIT
REZ 0.001 12.7098 0.0002 3.4101 EXCEEDS PERMISSIBLE LIMIT
6 16.8 REX 8.2374 0.003 1.5046 0.0005 EXCEEDS PERMISSIBLE LIMIT
REZ 0.0012 15.386 0.0002 2.6762 EXCEEDS PERMISSIBLE LIMIT
7 20.4 REX 10.2589 0.0034 1.0215 0.0004 WITHIN PERMISSIBLE LIMIT
REZ 0.0013 17.171 0.0001 1.785 EXCEEDS PERMISSIBLE LIMIT
8 24 REX 9.7831 0.0033 0.5242 0 WITHIN PERMISSIBLE LIMIT
REZ 0.0012 18.778 0 0.917 WITHIN PERMISSIBLE LIMIT
Average Displacement and interstorey drift calculation for a bare frame with shear wall at core And enlarging
sizes GF columns nearly 20 percentage with respect to IInd floor and above
Fig.5.1
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Fig 5.2 Mode shapes of a bare frame building
Fig 5.3
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Fig 5.4
Mode shapes of a Soft storied at GF building
(1) From the tables 4.1 to 4.6 ,it is seen that
average displacement and interstorey drift is not
varying linearly and the figure changes abruptly
in case of a soft storey.
(2) During processing it is also seen that for a simple
multistory framed building in lower seismic zone
II, III there is no problems of drift and building
will be safe except severe earth quake.
(3) Due to abrupt change in drift in case of soft
storey .it is necessary to control the drift so that
sudden collapse can be reduced during earth
quake particularly in seismic zone IV,V. thus
additional safety measures should be provided at
these levels i.e. ductile detailing as per IS code
13920 norms according to the forces and
moments to control the drift within tolerance
limit of the structure.
V. Conclusions
Thus from the results obtained during processing
,it is clear that for bare frame analysis or for complete
stiffened building there is no much problem in drift
failure particularly in lower seismic zones. But as we
go to higher zones than the ordinary multistory
buildings also faces the problem of drift more than
the prescribed by the IS code 1893-2002. But this
drift can be controlled to much by providing shear
wall or by simply enlarging the sizes of the columns
and beams without bothering the cost factor.
In case of a soft storey the drift limit goes to much
beyond the limit prescribed by different codes .As
seen in above tables that at GF to first floor drift is
nearly 1.90 times of a simple storey and it is
exceeding the critical limit causing sudden collapse
during earthquake.
As we again analyze a soft storey by putting a
shear wall at core portion and enlarging the columns
sizes nearly by 20%with ductile detailing to GF
beams, columns then the drift reduced by 60%
average with respect to soft storey. It means the drift
can be controlled in a soft storey by adopting the
above measure including a soft storey on a strong
foundation to avoid tilting during earthquake .For the
further safety GF to First floor height can be reduced
to 2.7instead to 3.2 to 3.5 with architectural type
narrow shear wall at outer middle and corner
columns so that soft storey stiffness can be achieved
with respect to above floors. Hence by adopting
above such measure soft storey can be controlled up
to a great extent and building damages /collapsing
can be limited with over all increase in cost by
20%onlyof ordinary type of buildings.
REFERENCES
[1.] Murty CVR. And Jain SK “A review of IS-
1893-1984 Provisions on seismic designs of
building” The Indian concrete journal,
November 1994.
[2.] STAAD Pro –V8i-Structural analysis and
designing software by Bentely.
[3.] Study material of short course on seismic
design of high rise building-Indian Institute
of information technology Hyderabad
[4.] Agrawal Pankaj and Shrikhande Manish
“Earthquake resistant design of structure”
PHL, Learning Pvt., Ltd. New Delhi-2010.
8. M.P. Mishra Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 12, (Part - 2) December 2015, pp.41-48
www.ijera.com 48|P a g e
[5.] Mishra M.P. M.Tech Thesis submitted under
guidance of Dubey S.K. on Static and
Dynamic Behaviour of multistorey building
–A comparative study.
[6.] SP-16-1980-Design Aids for Reinforced
concrete to IS-456-1978-Bureau of Indian
Standard, New Delhi.
[7.] Pillai S. Unnikrisha and Menon Devdas
“Reinfoced concrete design”-Tata McGraw
Hall education private limited-New Delhi-
110008
[8.] IS-875-1987,”Indian Standard code of
practice for structural safety loading
standard part-1,2” Bureau of Indian
Standard ,New Delhi .
[9.] BIS -1893 ,Criteria for Earthquake resistant
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and Buildings, Bureau of Indian Standard
,New Delhi -2002.
[10.] IS-456-1978 and IS -456-2000 “Indian
Standard of code and practice for plain and
reinforced concrete” Bureau of Indian
Standard, New Delhi -2000.
[11.] M.P. Mishra, Dr. S. K. Dubey “Seismic
Drift control in soft storied RCC buildings -
CriticalReviewInternational Journal of
Engineering and Technical Research
(IJETR) ISSN: 2321-0869 (O) 2454-4698
(P), Volume-3, Issue-8, August 2015
[12.] M.P. Mishra, Dr. S. K. Dubey “Seismic
Drift Consideration in soft storied RCC
buildings: A Critical Review” International
Journal of Engineering Research and
Development-e-ISSN: 2278-067X, p-ISSN:
2278-800X Volume 11, Issue 08 (August
2015), PP.16-20
[13.] M.P. Mishra, Dr. S. K. Dubey “Seismi
Response of RCC Multi-Storied Framed
Buildings” International Journal of
Advanced and Innovative Research (2278-
7844) / # 128 / Volume 4 issue 9
[14.] M.P. Mishra, Dr. S. K. Dubey “ Seismic
Drift and Damage Consideration in RCC
Multi-Storied Framed Buildings”
International Journal of Engineering
Associates (ISSN: 2320-0804) # 5 / Volume
4 Issue 10