This document presents a comparative study on the seismic response of 20-story regular and irregular reinforced concrete frame structures with and without base isolation under near-field and far-field ground motions. Nonlinear time history analyses were conducted using Kobe (HIK) and Bhuj earthquake records to represent far-field and near-field ground motions, respectively. Lead rubber bearings were used as the base isolation system. Parameters such as base shear, displacement, drift, and acceleration were compared for regular and irregular structures with fixed and isolated bases under both near-field and far-field ground motions. In general, base shear, displacement, and drift decreased for structures with base isolation compared to fixed base, and seismic response was greater under
IRJET - Seismic Comparison of OMRF & SMRF Structural System on Zone IIIRJET Journal
This document summarizes research on comparing the seismic performance of Ordinary Moment Resisting Frames (OMRFs) and Special Moment Resisting Frames (SMRFs). Several studies are reviewed that analyze the response of OMRF and SMRF buildings to earthquake loading, specifically examining parameters like base shear, story drift, displacements and forces. The studies generally find that SMRFs perform better under seismic loads - experiencing lower forces and displacements. SMRFs are therefore considered more effective and safer for earthquake-resistant design.
IRJET- Comparative Analysis of Tall Structure with and without Base Isola...IRJET Journal
This document summarizes a study that analyzes the seismic performance of a 29-story tall building both with and without base isolation. A fixed base structure model and base isolated structure model using lead rubber bearings are created in ETABS software. Both models are analyzed using the response spectrum method and their story displacements, drifts, accelerations, and shears are compared. The objectives are to see how base isolation can reduce seismic demands on the structure by increasing its period and flexibility. The methodology, structural models, material properties, seismic parameters, and response spectrum used are described. Results showing that base isolation increases story displacements but reduces other seismic demands are presented and discussed.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Performance Analysis of the Tall Structure with Diagrid for Seismic LoadingIRJET Journal
This document analyzes the performance of tall structures with diagrid frameworks under seismic loading. Three 18-story building models are created with square, octagonal, and circular plans using diagrid and shear wall systems. Linear static and dynamic analyses are performed using ETABS software. Results show the diagrid models have shorter natural periods and lower base shear, story displacement, and drift values compared to the equivalent shear wall models, indicating diagrid structures perform better seismically. The study aims to understand how diagrid systems help resist lateral loads in tall buildings.
IRJET- Comparative Analysis of Moment Resisting Frames of Steel and Composit...IRJET Journal
This document compares moment resisting frames made of steel composite materials and reinforced concrete (RC) under seismic loading. Four models each of a G+10 and G+20 building were analyzed with ETABS software - two as ordinary moment resisting frames (OMRF) and two as special moment resisting frames (SMRF). Results for steel composite frames showed lower displacement, drift, and shear compared to RC frames, but within acceptable limits. Steel composite structures provide advantages over RC structures such as reduced weight, cost, and faster construction for high-rise buildings.
Seismic base isolation in strengthening an existing retrofitted masonry reinf...eSAT Journals
Abstract Seismic base isolation is a fast advancing technology in which the superstructure is isolated from the entire structure or from the substructure by means of rubber bearing isolators or frictional sliding isolators. The main aim of the base isolation technology is to isolate the structure from the harmful effects of the ground accelerations or earthquake excitations. In this paper, the procedure for the selection of the three ground motions is briefly explained and they are used in analyzing a masonry – reinforced concrete office building for the Internal Revenue Service in the Huating County of the Pingliang City in China. The structure is first analyzed with the PKPM software to ascertain the structural internal forces are within reasonable limits but because this software cannot be used to advance analysis in the area of base isolation, Sap 2000 is used to remodel the structure, analyze, then apply the seismic base isolation. This office building has been strengthened to be fortified against ultimate bearing capacity failure as it is an existing structure. The lead rubber bearing isolators, LRB 400, LRB 500 and LRB 600 are used to isolate the building model and results from the structural response are compared, first amongst the time histories and then between the enveloped time histories and the response spectrum. The floor joint accelerations are observed to be reduced and the joint velocities as well, whereas the floor joint displacements are increased. The response spectrum alone is seen to not be an enough ground acceleration parameter in a seismic analysis and design of this model; as such it is recommended to include time history analysis. The maximum percentage decrease in acceleration and velocity can be seen occurring in the response spectrum, namely, 85.82% and 59.76%, respectively. The maximum percentage increase in the displacement is also evident in the response spectrum, 57.59%. In the time histories, the maximum is seen in Ec County Y-direction for the acceleration reduction at a value of 60.57%; Delta artif records a maximum velocity reduction of 28.42% in the Y-direction and finally, the Delta artif X-direction also records a maximum displacement increment, at a value of 26.36%.
This document summarizes a study that investigated the impact of plan irregularity in selecting a suitable structural framing system for analyzing and designing multi-story buildings. It analyzed and designed 20-story regular and irregular moment-resisting frames under gravity and seismic loads based on Indian codes. Results showed that plan irregularity did not significantly impact the amount of reinforcement required or the structural performance. Therefore, the study concluded that plan irregularity does not need to be an additional condition to consider when selecting an ordinary or special moment-resisting frame according to Indian code IS 13920:1993.
A comparative study of omrf & smrf structural system for tall & high ...eSAT Journals
Abstract The objective of this study is to investigate the seismic behavior of the structure i.e... OMRF (Ordinary moment resisting frame) & SMRF (Special R C moment Resisting frame). For this purpose 5th, 10th, 15th , 20th storied structure were modeled and analysis was done using Staad.Pro software and using the codes for analysis, IS 1893:2002, IS 456: 2000. The study assumed that the buildings were located in seismic zone II (Visakhapatnam region).The study involves the design of alternate shear wall in a structural frame and its orientation, which gives better results for the OMRF & SMRF structure constructed in and around Visakhapatnam region. The buildings are modeled with floor area of 600 sqm (20m x30m) with 5 bays along 20 m span each 4 m. and 5 bays along the 30 m span each 6 m. The design is carried out using STAAD.PRO software. Shear walls are designed by taking the results of the maximum value of the stress contour and calculation are done manually by using IS 456-2000 and IS 13920-1993. The displacements of the current level relative to the other level above or below are considered. The preferred framing system should meet drift requirements.
1. Up to 20 floored building subjected to seismic load for Visakhapatnam without shear wall
2. Up to 20 floored building subjected to seismic load for Visakhapatnam with shear wall
Key words: Seismic Behavior, Shear Wall, Orientation of shear wall, Story Drift, Serviceability. staad.pro
IRJET - Seismic Comparison of OMRF & SMRF Structural System on Zone IIIRJET Journal
This document summarizes research on comparing the seismic performance of Ordinary Moment Resisting Frames (OMRFs) and Special Moment Resisting Frames (SMRFs). Several studies are reviewed that analyze the response of OMRF and SMRF buildings to earthquake loading, specifically examining parameters like base shear, story drift, displacements and forces. The studies generally find that SMRFs perform better under seismic loads - experiencing lower forces and displacements. SMRFs are therefore considered more effective and safer for earthquake-resistant design.
IRJET- Comparative Analysis of Tall Structure with and without Base Isola...IRJET Journal
This document summarizes a study that analyzes the seismic performance of a 29-story tall building both with and without base isolation. A fixed base structure model and base isolated structure model using lead rubber bearings are created in ETABS software. Both models are analyzed using the response spectrum method and their story displacements, drifts, accelerations, and shears are compared. The objectives are to see how base isolation can reduce seismic demands on the structure by increasing its period and flexibility. The methodology, structural models, material properties, seismic parameters, and response spectrum used are described. Results showing that base isolation increases story displacements but reduces other seismic demands are presented and discussed.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Performance Analysis of the Tall Structure with Diagrid for Seismic LoadingIRJET Journal
This document analyzes the performance of tall structures with diagrid frameworks under seismic loading. Three 18-story building models are created with square, octagonal, and circular plans using diagrid and shear wall systems. Linear static and dynamic analyses are performed using ETABS software. Results show the diagrid models have shorter natural periods and lower base shear, story displacement, and drift values compared to the equivalent shear wall models, indicating diagrid structures perform better seismically. The study aims to understand how diagrid systems help resist lateral loads in tall buildings.
IRJET- Comparative Analysis of Moment Resisting Frames of Steel and Composit...IRJET Journal
This document compares moment resisting frames made of steel composite materials and reinforced concrete (RC) under seismic loading. Four models each of a G+10 and G+20 building were analyzed with ETABS software - two as ordinary moment resisting frames (OMRF) and two as special moment resisting frames (SMRF). Results for steel composite frames showed lower displacement, drift, and shear compared to RC frames, but within acceptable limits. Steel composite structures provide advantages over RC structures such as reduced weight, cost, and faster construction for high-rise buildings.
Seismic base isolation in strengthening an existing retrofitted masonry reinf...eSAT Journals
Abstract Seismic base isolation is a fast advancing technology in which the superstructure is isolated from the entire structure or from the substructure by means of rubber bearing isolators or frictional sliding isolators. The main aim of the base isolation technology is to isolate the structure from the harmful effects of the ground accelerations or earthquake excitations. In this paper, the procedure for the selection of the three ground motions is briefly explained and they are used in analyzing a masonry – reinforced concrete office building for the Internal Revenue Service in the Huating County of the Pingliang City in China. The structure is first analyzed with the PKPM software to ascertain the structural internal forces are within reasonable limits but because this software cannot be used to advance analysis in the area of base isolation, Sap 2000 is used to remodel the structure, analyze, then apply the seismic base isolation. This office building has been strengthened to be fortified against ultimate bearing capacity failure as it is an existing structure. The lead rubber bearing isolators, LRB 400, LRB 500 and LRB 600 are used to isolate the building model and results from the structural response are compared, first amongst the time histories and then between the enveloped time histories and the response spectrum. The floor joint accelerations are observed to be reduced and the joint velocities as well, whereas the floor joint displacements are increased. The response spectrum alone is seen to not be an enough ground acceleration parameter in a seismic analysis and design of this model; as such it is recommended to include time history analysis. The maximum percentage decrease in acceleration and velocity can be seen occurring in the response spectrum, namely, 85.82% and 59.76%, respectively. The maximum percentage increase in the displacement is also evident in the response spectrum, 57.59%. In the time histories, the maximum is seen in Ec County Y-direction for the acceleration reduction at a value of 60.57%; Delta artif records a maximum velocity reduction of 28.42% in the Y-direction and finally, the Delta artif X-direction also records a maximum displacement increment, at a value of 26.36%.
This document summarizes a study that investigated the impact of plan irregularity in selecting a suitable structural framing system for analyzing and designing multi-story buildings. It analyzed and designed 20-story regular and irregular moment-resisting frames under gravity and seismic loads based on Indian codes. Results showed that plan irregularity did not significantly impact the amount of reinforcement required or the structural performance. Therefore, the study concluded that plan irregularity does not need to be an additional condition to consider when selecting an ordinary or special moment-resisting frame according to Indian code IS 13920:1993.
A comparative study of omrf & smrf structural system for tall & high ...eSAT Journals
Abstract The objective of this study is to investigate the seismic behavior of the structure i.e... OMRF (Ordinary moment resisting frame) & SMRF (Special R C moment Resisting frame). For this purpose 5th, 10th, 15th , 20th storied structure were modeled and analysis was done using Staad.Pro software and using the codes for analysis, IS 1893:2002, IS 456: 2000. The study assumed that the buildings were located in seismic zone II (Visakhapatnam region).The study involves the design of alternate shear wall in a structural frame and its orientation, which gives better results for the OMRF & SMRF structure constructed in and around Visakhapatnam region. The buildings are modeled with floor area of 600 sqm (20m x30m) with 5 bays along 20 m span each 4 m. and 5 bays along the 30 m span each 6 m. The design is carried out using STAAD.PRO software. Shear walls are designed by taking the results of the maximum value of the stress contour and calculation are done manually by using IS 456-2000 and IS 13920-1993. The displacements of the current level relative to the other level above or below are considered. The preferred framing system should meet drift requirements.
1. Up to 20 floored building subjected to seismic load for Visakhapatnam without shear wall
2. Up to 20 floored building subjected to seismic load for Visakhapatnam with shear wall
Key words: Seismic Behavior, Shear Wall, Orientation of shear wall, Story Drift, Serviceability. staad.pro
IRJET- A Study of Various Structural Framing Systems Subjected to Seismic LoadsIRJET Journal
This document summarizes previous research on analyzing the seismic behavior of different structural framing systems. Studies have compared the performance of Ordinary Moment Resisting Frames (OMRF) and Special Moment Resisting Frames (SMRF) in various seismic zones. The current study aims to compare the behavior of OMRF and SMRF structures in zones 3, 4, and 5 under seismic loads. It also examines using lightweight materials like siporex in zone 5 to improve seismic performance.
Effect of Friction Dampers on RC Structures Subjected to Earthquakeijtsrd
Among all the natural disasters such as flood, earthquake, drought, hurricanes the least understood and the most destructive one is earthquake. Since, they cause many of injuries and economical losses leaving behind a series of signs of panic. Necessity to implement seismic codes in building design. For this a better method of analysis such as static analysis, dynamic analysis and time history analysis has to be adopted for performing the structures seismic risk assessment. This dissertation work is concerned with the "Studies on Effect of Friction Dampers on the Seismic Performance of RC G 15 Storey Buildings" According to IS 1893 part 1 2002 codal provisions the structures are analyzed by Equivalent Static method and Time History method. The modeling and analysis is done with ETAB SOFTWARE and the results obtained are seismic parameters such as Time period, Base shear, Lateral displacement and Inter storey drift, storey stiffness, storey accelaration are tabulated and then comparative study of structures with and without Friction dampers has been done. Akshay R | B. S. Suresh Chandra "Effect of Friction Dampers on RC Structures Subjected to Earthquake" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd28017.pdfPaper URL: https://www.ijtsrd.com/engineering/structural-engineering/28017/effect-of-friction-dampers-on-rc-structures-subjected-to-earthquake/akshay-r
IRJET-Analysis of G+25 RCC Bare Framed Structure with Shear Wall Under the Ef...IRJET Journal
This document presents an analysis of a G+25 reinforced concrete bare framed structure with shear walls under seismic loads. Four models are analyzed with shear walls placed at different locations (intermediate, corner, middle, core) and compared to a conventional structure without shear walls. The objectives are to analyze seismic forces for Zone III and compare bending moments and shear forces. The methodology uses STAAD Pro V8i to model and analyze the structures. Results show that the model with a shear wall at the corner performs best, with bending moments reduced by 37% compared to the conventional structure without shear walls. In conclusion, adding shear walls, especially at the corner, improves a structure's ability to resist seismic forces.
This summarizes a document describing a seismic isolated building designed by Toyo Ito Architects. The building uses capital seismic isolation at the basement floor with all seismic isolators located on top of steel reinforced concrete columns. This allows for a shallow foundation and reduced drilling costs. Above the basement, the building uses a steel rigid frame structure with concrete-filled tubular steel columns and H-section steel beams. The document then describes the architectural plan and structural design, including verification using time history response analysis.
Tokyo Sky Tree is a 634-meter broadcasting and observation tower in Tokyo, Japan. It has the world's tallest self-supporting steel tower structure. The tower was designed to withstand strong winds with a return period of 2000 years and major earthquakes through its triangular steel frame, reinforced concrete core, oil dampers, and vibraton control systems. Over 50 million people visited the tower and surrounding commercial facilities in the first year after its opening in 2012, making it a major tourist destination.
IRJET- Study of Behaviour of Multi-Storey Building with Shear WallsIRJET Journal
1) Shear walls are structural members designed to resist lateral forces like those caused by earthquakes. They improve a building's stiffness and ability to resist earthquake shaking.
2) The document studies the performance of different positions of shear walls in multi-storey buildings subjected to seismic loads. Shear walls placed along the periphery of the building were found to most efficiently resist seismic loads.
3) Shear walls improve a building's performance during earthquakes by reducing lateral displacement, decreasing vibration period, and limiting induced moments and torsion effects from seismic forces. When properly designed and constructed, shear walls provide effective seismic resistance.
IRJET- Study of Behavior Parameters of the Building with Variations in Story ...IRJET Journal
This document discusses a study that analyzes the behavior of buildings with variations in story height and number of bays using different structural frame configurations. Ordinary moment resisting frames (OMRF) and special moment resisting frames (SMRF) are considered. Buildings are modeled and pushover analysis is performed using SAP2000 software. Behavior parameters are calculated from pushover curves and compared to investigate the performance of OMRF and SMRF structures. The objective is to determine the appropriate type of frame to use for seismic loads in different scenarios.
Evaluation of Seismic Behaviour of RCC Building using Coupled Shear wallIRJET Journal
1) The document analyzes the seismic behavior of reinforced concrete buildings with solid shear walls and coupled shear walls located in seismic zone IV.
2) Coupled shear walls consist of two or more shear walls connected by a coupling beam, which allows for openings. The performance depends on the arrangement and size of the coupling beam.
3) A 10-story reinforced concrete special moment resisting frame building with solid and coupled shear walls in the corners is modeled and analyzed using ETABS software. Responses such as story displacement, drift, and shear are evaluated and compared.
Seismic Analysis of regular & Irregular RCC frame structuresDaanish Zama
This document discusses seismic analysis of regular and irregular reinforced concrete framed buildings. It analyzes 4 building models - a regular 4-story building, a stiffness irregular building with a soft ground story, and two vertically irregular buildings with setbacks on the 3rd floor and 2nd/3rd floors. Static analysis was performed to compare bending moments, shear forces, story drifts, and joint displacements. Results showed irregular buildings experienced higher seismic demands. The regular building performed best, with the single setback building also performing well. Irregular configurations increase seismic effects and should be minimized in design.
A COMPARATIVE STUDY OF OMRF & SMRF STRUCTURAL SYSTEM USING DIFFERENT SOFTWARESAM Publications
This study is carried out to investigate the seismic behaviour of the structure having various structural configurations
like OMRF (Ordinary Moment Resisting Frames), SMRF (Special Moment Resisting Frames) using different softwares i.e.
Stadd.Pro & Etabs. A comparative study of all the types of frames will shed light on the best suited frame to be adopted for seismic
loads in Indian scenario. For this purpose, a G+6 storey R.C.C. regular building are analysed for OMRCF, SMRCF framing
configurations in Seismic Zone III & IV according to Indian codes. Linear static Analysis or Equivalent static Analysis are carried
out to evaluate their structural efficiencies in terms of storey drifts, average storey displacement, Time period. In OMRF structures
the design and detailing of reinforcement are executed as per the guide lines of I.S. 456-2000 which make the structure less tough
and ductile in comparison of SMRF structures. The basic approach of earthquake resistant design should be based on lateral
strength as well as deformability and ductility capacity of structure .In SMRF structures Beams, columns, and beam-column joints
are proportioned and detailed as per I.S. code 13920(2002) which give adequate toughness and ductility to resist severe earthquake
shock without collapse. Thus it has been observed that SMRF structures behave well in earthquake than OMRF structures.
IRJET-Analysis and Seismic Response Reduction of Building using Base Isolatio...IRJET Journal
This document summarizes a study analyzing the seismic response of buildings using base isolation techniques. The study models 10, 15, and 20-story buildings in E-TABS software, both with fixed bases and with base isolation using lead-rubber bearings. Time history analyses are conducted using El Centro earthquake records. Key dynamic properties like shear force, bending moment, base shear, drift, and acceleration are compared between fixed-base and base-isolated buildings to evaluate the effectiveness of base isolation in reducing seismic response. Previous literature on soil-structure interaction and base isolation is also reviewed. The results indicate that base isolation is effective at reducing structural damage during earthquakes by concentrating displacements at the isolation level.
This document discusses base isolation, which is a technique used to protect structures from earthquake forces. Base isolation involves installing bearing pads between a building and its foundation, allowing the structure to move independently from the ground during an earthquake. When ground shakes, the bearing pads allow the building to remain stationary while the foundation moves beneath it. This isolates the building from earthquake forces. The document then reviews different base isolation system designs and locations, comparing the performance of isolated versus fixed-base structures through various case studies and analyses. It concludes that base isolation is an effective method to significantly reduce seismic forces on buildings and bridges by distributing earthquake loads more evenly.
This document reviews the behavior of special moment resisting frames (SMRFs) and intermediate moment resisting frames (IMRFs) during earthquakes. SMRFs are designed to withstand significant inelastic deformations in high seismic regions, while IMRFs are intended for moderate deformations in low to mid seismic areas. SMRFs have stricter design requirements than IMRFs. Analysis showed that SMRFs have greater collapse capacity and longer progressive collapse duration than IMRFs, reducing risk of structural sidesway collapse by 33.4% compared to IMRFs. The use of SMRFs also increases required column longitudinal reinforcement by 40% over IMRFs.
SEISMIC ISOLATION OF RC FRAMED STRUCTURE WITH AND WITHOUT INFILLSIAEME Publication
Earthquakes are the nature’s greatest hazard which cannot be exactly predicted by human
beings. Earthquake is a sudden movement of earth’s surface with the release of massive energy
in the form of seismic waves. There are so many methods to control the vibration of the
buildings like passive, active and hybrid control systems.[1] Base isolation is a passive control
system. In the present work, a (G+3) structure considering with and without infill’s subjected
to seismic force along with static gravity loads are analyzed using Response Spectrum Method
in ETABS-2015 package. From the study, the response of the structure obtained is time period,
base shear, story displacement and inter-story drifts and also the comparison is drawn for the
same parameters considering structure as bare and infill frames. The variation in percentage
of steel is also presented. It is found that the time period and story displacement increases
while base shear and story drifts gets reduces with the provision of effective base isolators.
The document discusses the philosophy of seismic design of building structures. It explains that seismic design aims to allow some damage to occur in major earthquakes to avoid collapse, by designing structures to yield in specific zones. This dissipates energy through hysteretic damping. Structures are designed to remain elastic in minor quakes and have minimal damage in moderate quakes. Common lateral force resisting systems for reinforced concrete buildings are then described, including moment frames, shear walls, dual frames+walls, braced frames, trussed frames, and tube frames.
IRJET- Effective Location of Shear Wall, its Significance and Displacement An...IRJET Journal
This document discusses the effective location of shear walls in buildings and analyzes their impact on lateral displacement. It summarizes the results of analyzing a typical 11-story building model in different configurations: without shear walls, with shear walls only at the corners, and with shear walls around the entire perimeter. The analysis found that lateral displacement decreased significantly when shear walls were included. Specifically, total displacement was reduced by over 50% when shear walls were placed around the entire perimeter compared to no shear walls. Properly located shear walls can effectively resist earthquake forces and reduce lateral sway, demonstrating the importance of optimizing shear wall placement in high-rise building design.
MODAL AND RESPONSE SPECTRUM (IS 18932002) ANALYSIS 0F R.C FRAME BUILDING (IT ...Mintu Choudhury
This document discusses modeling a reinforced concrete frame building for seismic analysis. It describes modeling the building using frame elements in SAP 2000. Key elements include:
- Modeling beams and columns as frame elements
- Considering the building's diaphragm, which can be rigid, semi-rigid, or flexible
- Performing modal analysis to determine the building's vibration modes and periods
- Conducting response spectrum analysis and comparing results to the equivalent lateral force method
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
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- Time History Analysis of Multi Story Building with and without Base Is...IRJET Journal
This document summarizes a study that analyzes the seismic performance of a 24-story building both with and without base isolation. A base-isolated building model was created using lead-rubber bearings at the base, and both models were subjected to time history analysis using ground motion data from the 2001 Bhuj earthquake. The results show that the base-isolated building experienced significantly reduced story stiffness, story acceleration, story displacement and story drift compared to the fixed-base building, demonstrating the effectiveness of base isolation in improving seismic performance.
Seismic Base Isolators under Individual and Combined Use in Multi Storied Bui...IRJET Journal
This document reviews the use of seismic base isolators under individual and combined configurations in multi-story buildings. It discusses different types of base isolators including lead rubber bearings and friction pendulum bearings. It also reviews past literature that has evaluated the seismic response of buildings isolated with different isolator configurations and combinations. The literature shows that base isolation is effective at reducing floor accelerations, inter-story drifts, and base shear. Combined isolation systems that use multiple isolator types can further reduce responses compared to individual isolator systems, but may increase displacements.
SEISMIC ANALYTICAL STUDY OF RC AND STEEL STRUCTURES WITH LEAD RUBBER BEARING ...IRJET Journal
This document analyzes the seismic performance of reinforced concrete and steel structures with lead rubber bearings used for base isolation. Nonlinear time history analysis was performed on 10-story RC and steel buildings using ETABS software. The analysis found that lead rubber bearings reduced storey displacements and drifts compared to fixed base structures. Specifically, drifts decreased by 61.8% for RC structures and 44.98% for steel structures when using lead rubber bearings. Therefore, the study showed that base isolation using lead rubber bearings effectively minimized the seismic response of buildings.
IRJET- A Study of Various Structural Framing Systems Subjected to Seismic LoadsIRJET Journal
This document summarizes previous research on analyzing the seismic behavior of different structural framing systems. Studies have compared the performance of Ordinary Moment Resisting Frames (OMRF) and Special Moment Resisting Frames (SMRF) in various seismic zones. The current study aims to compare the behavior of OMRF and SMRF structures in zones 3, 4, and 5 under seismic loads. It also examines using lightweight materials like siporex in zone 5 to improve seismic performance.
Effect of Friction Dampers on RC Structures Subjected to Earthquakeijtsrd
Among all the natural disasters such as flood, earthquake, drought, hurricanes the least understood and the most destructive one is earthquake. Since, they cause many of injuries and economical losses leaving behind a series of signs of panic. Necessity to implement seismic codes in building design. For this a better method of analysis such as static analysis, dynamic analysis and time history analysis has to be adopted for performing the structures seismic risk assessment. This dissertation work is concerned with the "Studies on Effect of Friction Dampers on the Seismic Performance of RC G 15 Storey Buildings" According to IS 1893 part 1 2002 codal provisions the structures are analyzed by Equivalent Static method and Time History method. The modeling and analysis is done with ETAB SOFTWARE and the results obtained are seismic parameters such as Time period, Base shear, Lateral displacement and Inter storey drift, storey stiffness, storey accelaration are tabulated and then comparative study of structures with and without Friction dampers has been done. Akshay R | B. S. Suresh Chandra "Effect of Friction Dampers on RC Structures Subjected to Earthquake" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd28017.pdfPaper URL: https://www.ijtsrd.com/engineering/structural-engineering/28017/effect-of-friction-dampers-on-rc-structures-subjected-to-earthquake/akshay-r
IRJET-Analysis of G+25 RCC Bare Framed Structure with Shear Wall Under the Ef...IRJET Journal
This document presents an analysis of a G+25 reinforced concrete bare framed structure with shear walls under seismic loads. Four models are analyzed with shear walls placed at different locations (intermediate, corner, middle, core) and compared to a conventional structure without shear walls. The objectives are to analyze seismic forces for Zone III and compare bending moments and shear forces. The methodology uses STAAD Pro V8i to model and analyze the structures. Results show that the model with a shear wall at the corner performs best, with bending moments reduced by 37% compared to the conventional structure without shear walls. In conclusion, adding shear walls, especially at the corner, improves a structure's ability to resist seismic forces.
This summarizes a document describing a seismic isolated building designed by Toyo Ito Architects. The building uses capital seismic isolation at the basement floor with all seismic isolators located on top of steel reinforced concrete columns. This allows for a shallow foundation and reduced drilling costs. Above the basement, the building uses a steel rigid frame structure with concrete-filled tubular steel columns and H-section steel beams. The document then describes the architectural plan and structural design, including verification using time history response analysis.
Tokyo Sky Tree is a 634-meter broadcasting and observation tower in Tokyo, Japan. It has the world's tallest self-supporting steel tower structure. The tower was designed to withstand strong winds with a return period of 2000 years and major earthquakes through its triangular steel frame, reinforced concrete core, oil dampers, and vibraton control systems. Over 50 million people visited the tower and surrounding commercial facilities in the first year after its opening in 2012, making it a major tourist destination.
IRJET- Study of Behaviour of Multi-Storey Building with Shear WallsIRJET Journal
1) Shear walls are structural members designed to resist lateral forces like those caused by earthquakes. They improve a building's stiffness and ability to resist earthquake shaking.
2) The document studies the performance of different positions of shear walls in multi-storey buildings subjected to seismic loads. Shear walls placed along the periphery of the building were found to most efficiently resist seismic loads.
3) Shear walls improve a building's performance during earthquakes by reducing lateral displacement, decreasing vibration period, and limiting induced moments and torsion effects from seismic forces. When properly designed and constructed, shear walls provide effective seismic resistance.
IRJET- Study of Behavior Parameters of the Building with Variations in Story ...IRJET Journal
This document discusses a study that analyzes the behavior of buildings with variations in story height and number of bays using different structural frame configurations. Ordinary moment resisting frames (OMRF) and special moment resisting frames (SMRF) are considered. Buildings are modeled and pushover analysis is performed using SAP2000 software. Behavior parameters are calculated from pushover curves and compared to investigate the performance of OMRF and SMRF structures. The objective is to determine the appropriate type of frame to use for seismic loads in different scenarios.
Evaluation of Seismic Behaviour of RCC Building using Coupled Shear wallIRJET Journal
1) The document analyzes the seismic behavior of reinforced concrete buildings with solid shear walls and coupled shear walls located in seismic zone IV.
2) Coupled shear walls consist of two or more shear walls connected by a coupling beam, which allows for openings. The performance depends on the arrangement and size of the coupling beam.
3) A 10-story reinforced concrete special moment resisting frame building with solid and coupled shear walls in the corners is modeled and analyzed using ETABS software. Responses such as story displacement, drift, and shear are evaluated and compared.
Seismic Analysis of regular & Irregular RCC frame structuresDaanish Zama
This document discusses seismic analysis of regular and irregular reinforced concrete framed buildings. It analyzes 4 building models - a regular 4-story building, a stiffness irregular building with a soft ground story, and two vertically irregular buildings with setbacks on the 3rd floor and 2nd/3rd floors. Static analysis was performed to compare bending moments, shear forces, story drifts, and joint displacements. Results showed irregular buildings experienced higher seismic demands. The regular building performed best, with the single setback building also performing well. Irregular configurations increase seismic effects and should be minimized in design.
A COMPARATIVE STUDY OF OMRF & SMRF STRUCTURAL SYSTEM USING DIFFERENT SOFTWARESAM Publications
This study is carried out to investigate the seismic behaviour of the structure having various structural configurations
like OMRF (Ordinary Moment Resisting Frames), SMRF (Special Moment Resisting Frames) using different softwares i.e.
Stadd.Pro & Etabs. A comparative study of all the types of frames will shed light on the best suited frame to be adopted for seismic
loads in Indian scenario. For this purpose, a G+6 storey R.C.C. regular building are analysed for OMRCF, SMRCF framing
configurations in Seismic Zone III & IV according to Indian codes. Linear static Analysis or Equivalent static Analysis are carried
out to evaluate their structural efficiencies in terms of storey drifts, average storey displacement, Time period. In OMRF structures
the design and detailing of reinforcement are executed as per the guide lines of I.S. 456-2000 which make the structure less tough
and ductile in comparison of SMRF structures. The basic approach of earthquake resistant design should be based on lateral
strength as well as deformability and ductility capacity of structure .In SMRF structures Beams, columns, and beam-column joints
are proportioned and detailed as per I.S. code 13920(2002) which give adequate toughness and ductility to resist severe earthquake
shock without collapse. Thus it has been observed that SMRF structures behave well in earthquake than OMRF structures.
IRJET-Analysis and Seismic Response Reduction of Building using Base Isolatio...IRJET Journal
This document summarizes a study analyzing the seismic response of buildings using base isolation techniques. The study models 10, 15, and 20-story buildings in E-TABS software, both with fixed bases and with base isolation using lead-rubber bearings. Time history analyses are conducted using El Centro earthquake records. Key dynamic properties like shear force, bending moment, base shear, drift, and acceleration are compared between fixed-base and base-isolated buildings to evaluate the effectiveness of base isolation in reducing seismic response. Previous literature on soil-structure interaction and base isolation is also reviewed. The results indicate that base isolation is effective at reducing structural damage during earthquakes by concentrating displacements at the isolation level.
This document discusses base isolation, which is a technique used to protect structures from earthquake forces. Base isolation involves installing bearing pads between a building and its foundation, allowing the structure to move independently from the ground during an earthquake. When ground shakes, the bearing pads allow the building to remain stationary while the foundation moves beneath it. This isolates the building from earthquake forces. The document then reviews different base isolation system designs and locations, comparing the performance of isolated versus fixed-base structures through various case studies and analyses. It concludes that base isolation is an effective method to significantly reduce seismic forces on buildings and bridges by distributing earthquake loads more evenly.
This document reviews the behavior of special moment resisting frames (SMRFs) and intermediate moment resisting frames (IMRFs) during earthquakes. SMRFs are designed to withstand significant inelastic deformations in high seismic regions, while IMRFs are intended for moderate deformations in low to mid seismic areas. SMRFs have stricter design requirements than IMRFs. Analysis showed that SMRFs have greater collapse capacity and longer progressive collapse duration than IMRFs, reducing risk of structural sidesway collapse by 33.4% compared to IMRFs. The use of SMRFs also increases required column longitudinal reinforcement by 40% over IMRFs.
SEISMIC ISOLATION OF RC FRAMED STRUCTURE WITH AND WITHOUT INFILLSIAEME Publication
Earthquakes are the nature’s greatest hazard which cannot be exactly predicted by human
beings. Earthquake is a sudden movement of earth’s surface with the release of massive energy
in the form of seismic waves. There are so many methods to control the vibration of the
buildings like passive, active and hybrid control systems.[1] Base isolation is a passive control
system. In the present work, a (G+3) structure considering with and without infill’s subjected
to seismic force along with static gravity loads are analyzed using Response Spectrum Method
in ETABS-2015 package. From the study, the response of the structure obtained is time period,
base shear, story displacement and inter-story drifts and also the comparison is drawn for the
same parameters considering structure as bare and infill frames. The variation in percentage
of steel is also presented. It is found that the time period and story displacement increases
while base shear and story drifts gets reduces with the provision of effective base isolators.
The document discusses the philosophy of seismic design of building structures. It explains that seismic design aims to allow some damage to occur in major earthquakes to avoid collapse, by designing structures to yield in specific zones. This dissipates energy through hysteretic damping. Structures are designed to remain elastic in minor quakes and have minimal damage in moderate quakes. Common lateral force resisting systems for reinforced concrete buildings are then described, including moment frames, shear walls, dual frames+walls, braced frames, trussed frames, and tube frames.
IRJET- Effective Location of Shear Wall, its Significance and Displacement An...IRJET Journal
This document discusses the effective location of shear walls in buildings and analyzes their impact on lateral displacement. It summarizes the results of analyzing a typical 11-story building model in different configurations: without shear walls, with shear walls only at the corners, and with shear walls around the entire perimeter. The analysis found that lateral displacement decreased significantly when shear walls were included. Specifically, total displacement was reduced by over 50% when shear walls were placed around the entire perimeter compared to no shear walls. Properly located shear walls can effectively resist earthquake forces and reduce lateral sway, demonstrating the importance of optimizing shear wall placement in high-rise building design.
MODAL AND RESPONSE SPECTRUM (IS 18932002) ANALYSIS 0F R.C FRAME BUILDING (IT ...Mintu Choudhury
This document discusses modeling a reinforced concrete frame building for seismic analysis. It describes modeling the building using frame elements in SAP 2000. Key elements include:
- Modeling beams and columns as frame elements
- Considering the building's diaphragm, which can be rigid, semi-rigid, or flexible
- Performing modal analysis to determine the building's vibration modes and periods
- Conducting response spectrum analysis and comparing results to the equivalent lateral force method
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
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- Time History Analysis of Multi Story Building with and without Base Is...IRJET Journal
This document summarizes a study that analyzes the seismic performance of a 24-story building both with and without base isolation. A base-isolated building model was created using lead-rubber bearings at the base, and both models were subjected to time history analysis using ground motion data from the 2001 Bhuj earthquake. The results show that the base-isolated building experienced significantly reduced story stiffness, story acceleration, story displacement and story drift compared to the fixed-base building, demonstrating the effectiveness of base isolation in improving seismic performance.
Seismic Base Isolators under Individual and Combined Use in Multi Storied Bui...IRJET Journal
This document reviews the use of seismic base isolators under individual and combined configurations in multi-story buildings. It discusses different types of base isolators including lead rubber bearings and friction pendulum bearings. It also reviews past literature that has evaluated the seismic response of buildings isolated with different isolator configurations and combinations. The literature shows that base isolation is effective at reducing floor accelerations, inter-story drifts, and base shear. Combined isolation systems that use multiple isolator types can further reduce responses compared to individual isolator systems, but may increase displacements.
SEISMIC ANALYTICAL STUDY OF RC AND STEEL STRUCTURES WITH LEAD RUBBER BEARING ...IRJET Journal
This document analyzes the seismic performance of reinforced concrete and steel structures with lead rubber bearings used for base isolation. Nonlinear time history analysis was performed on 10-story RC and steel buildings using ETABS software. The analysis found that lead rubber bearings reduced storey displacements and drifts compared to fixed base structures. Specifically, drifts decreased by 61.8% for RC structures and 44.98% for steel structures when using lead rubber bearings. Therefore, the study showed that base isolation using lead rubber bearings effectively minimized the seismic response of buildings.
IRJET- A Study on Seismic Performance of Reinforced Concrete Frame with L...IRJET Journal
This document presents a study on the seismic performance of a 10-storey reinforced concrete frame with different lateral force resistant systems, including a base isolation system using lead rubber bearings. Three models of the frame were analyzed: fixed base, braced with X-bracing, and base isolated. Time history, static, and pushover analyses were conducted. The results show that the base isolated frame performed best in reducing story drift, displacement, shear, and acceleration under seismic loading compared to the fixed base and braced frames. Maximum drift was 0.415mm for the base isolated frame versus 26.62mm for the fixed base frame. The base shear was also significantly reduced from 2294.3kN to 32.935
Response of High Rise Building With Lead Rubber Bearing, High Damping Rubber ...IRJET Journal
This document summarizes a study that analyzes the response of a 19-story reinforced concrete building in Delhi, India (located in seismic zone IV) using different base isolation systems. The study models the building using SAP2000 software and analyzes the response using response spectrum analysis and time history analysis. It compares the performance of the building using lead rubber bearing (LRB), high damping rubber bearing (HDRB), and friction pendulum system (FPS) base isolation, looking at period, displacement, base shear, and story drift. The friction pendulum system provided the lowest base shear. Time history analysis was used to further analyze the best performing friction pendulum system isolation.
IRJET- The State of the Art on Seismic Isolation of Shear Wall Structure ...IRJET Journal
This document summarizes research on using elastomeric base isolators to seismically isolate shear wall structures. It begins with an introduction to base isolation and different types of isolators. It then reviews several past studies that analyzed the seismic performance of buildings with base isolators using computer modeling and found base isolation reduced accelerations, drifts, and forces on the structure. The document concludes that base isolation is effective at mitigating seismic demands but further research is still needed to address issues like vertical excitation of building components and overturning forces in slender structures.
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.
The document discusses the dynamic response of a 14-storey reinforced concrete frame building using base isolators. It aims to analyze the response of the building with and without base isolators, including lead rubber bearings and sliding bearings, under earthquake ground motions. The analysis is performed using the finite element software ETABS. The results show that base isolation is effective at reducing seismic responses like displacement, acceleration, base shear and storey drift compared to a fixed base building. PTFE isolators provide more reduction than LRB isolators in most responses. Irregularities in building plan and elevation also increase the response of a fixed base building.
Seismic Analysis of Fixed Base and Base Isolated RC Buildings Having Diaphrag...IRJET Journal
This document discusses seismic analysis of fixed base and base isolated reinforced concrete buildings with diaphragm discontinuities. Six models of a G+4 story building with different shapes and positions of slab openings are analyzed using ETABS software. Response spectrum analysis is conducted to evaluate the seismic response in terms of storey displacement, base shear, time period, and storey drift. Lead rubber bearings are used as base isolators, which increase time period and storey displacement while decreasing base shear and storey drift compared to a fixed base building. The goal is to determine the most vulnerable building model and evaluate the effectiveness of base isolation for improving seismic performance.
Effect of Positioning and Configuration of Shear Walls on Seismic Performance...IRJET Journal
1) The document analyzes the seismic performance of RC buildings with different shear wall configurations on both hilly and plain terrain.
2) Five building models are considered: without shear walls, with straight, L-shaped, T-shaped, and channel-shaped shear walls.
3) Response spectrum analysis is performed using ETABS software. Results for fundamental time period, base shear, and story displacements are compared between the models.
IRJET- Seismic Response of Multi-Storey Building with Short Core Buckling...IRJET Journal
This document summarizes a study that analyzes the seismic response of multi-story buildings with different bracing systems, including short core buckling restrained braces (BRBs). 8- and 16-story building models were created with conventional bracing, long core BRBs, and short core BRBs. Non-linear time history analysis was performed and results were compared. Short core BRBs have a shorter steel core than conventional long core BRBs, which can impact energy dissipation. The study aims to provide more detailed behavior analysis of buildings with short core BRBs using different core materials.
IRJET- A Study on Effect of LRB Isolators on Varying Height of Rectangula...IRJET Journal
This document analyzes the effect of using lead rubber bearing (LRB) isolators on structures of varying heights when subjected to seismic activity. Non-linear time history analyses were conducted on 4, 10, 15, and 20-story rectangular reinforced concrete structures both with and without LRB isolators. The results showed that using LRB isolators significantly reduced story rotation, acceleration, displacement, and drift across all building heights compared to fixed-base structures. Additionally, LRB isolators increased the natural period of the structures, which decreased the lateral forces experienced. In conclusion, seismic isolation through the use of LRB isolators improved the performance of structures and was more effective at mitigating earthquake effects in taller buildings.
This document summarizes research on base isolated structures. It discusses how base isolation systems work to decouple structures from ground shaking during earthquakes by increasing the fundamental period. This period shift reduces floor accelerations and drift. Three elements of base isolation systems are identified: flexible mounts, dampers for energy dissipation, and means of providing rigidity under low loads. Literature on nonlinear analysis of base isolated buildings using various isolation systems like lead-rubber bearings and friction sliders is reviewed. Studies show base isolation significantly reduces seismic response like base shear, drift and accelerations compared to fixed base structures.
SEISMIC ANALYSIS OF HYBRID STRUCTURAL CONTROL SYSTEM IN RC BUILDINGIRJET Journal
The document discusses seismic analysis of a hybrid structural control system for RC buildings that combines lead rubber bearing (LRB) seismic isolation and fluid viscous dampers (FVD). Finite element models of RC buildings with heights of 60m, 105m, and 150m were created with the isolators located at the base or one-fifth of the building height. Time history analyses were performed under three earthquake records to compare the structural response parameters between the fixed-base building and various structural control configurations. The analyses aimed to investigate the effectiveness of combining LRB isolation with FVD energy dissipation in reducing seismic demands on high-rise buildings.
IRJET- Dynamic Analysis and Design of G+ 8 Storey RC Structure by Providing L...IRJET Journal
This document summarizes a study on analyzing the performance of a G+8 reinforced concrete building using lead rubber bearings as a base isolation system compared to a fixed base structure. Key points:
1) A G+8 RC building was modeled in SAP2000 software. Static pushover and nonlinear time history analyses were performed considering Kobe ground motion for both fixed base and base isolated conditions.
2) Lead rubber bearings were designed and used as the base isolation system by modeling their properties as link elements in SAP2000.
3) Results for period, base shear, and displacements were compared between the fixed base and base isolated structures to analyze the effectiveness of lead rubber bearings in reducing seismic response
Earthquake Performance of RCC Frame Structure using different Types of Bracin...IRJET Journal
This document summarizes research on using different types of bracings (X, V, inverted V) and lead rubber bearing base isolation to improve the earthquake performance of reinforced concrete frame structures. The forces on structures using different bracing configurations are analyzed using computer software. Bracings increase structural stiffness and strength while reducing deformations from lateral loads like wind and earthquakes. Base isolation increases the fundamental period of the structure to reduce earthquake forces by separating the superstructure from the substructure with flexible isolators. Lead rubber bearings are discussed as an effective isolation system that provides horizontal flexibility, energy dissipation, and vertical rigidity.
Study of Vertical Irregularity of Tall RC Structure Under Lateral LoadIRJET Journal
This document summarizes a study on the behavior of tall reinforced concrete (RC) structures with vertical irregularities (setbacks and mass irregularities) under lateral loads. Various 30-story RC building models were analyzed using ETABS 2013 software, including regular, setback, and mass irregular models for Seismic Zones 5 and 2. Parameters like story displacement, drift, stiffness, base shear, and time period were compared. Results showed that structures with setbacks or mass irregularities experienced increased displacements, drifts, and base shears compared to regular structures, with greater effects in Zone 5. Irregular structures are more vulnerable to damage from earthquakes.
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- Comparative Analysis of Effects of Base Isolator & Fluid Viscous Dampe...IRJET Journal
This document presents a comparative analysis of the effects of base isolators and fluid viscous dampers on the seismic response of reinforced concrete structures. It describes base isolators and fluid viscous dampers as passive seismic control techniques that help reduce structural response compared to fixed-base buildings. The objectives are to develop simplified models of a multi-story building with each seismic control technique and compare their responses through time history analysis under earthquake loads. Results show that base isolators generally provide better vibration control than fluid viscous dampers in terms of reducing story displacements, drifts, and other seismic demands.
IRJET - Analysis of Flat Slab Structural System in Different Earthquake Zones...IRJET Journal
1) The document analyzes the seismic performance of flat slab structural systems in different earthquake zones of India.
2) It models a 5-story flat slab building in the earthquake zones II-V and analyzes required steel in columns, nodal displacements, and plate stresses.
3) The results show that steel requirements and displacements remain nearly constant from zones II-IV but sharply increase in zone V, indicating flat slabs perform poorly in high seismic zones.
IRJET - Effect of Seismic Pounding between Adjacent Irregular Buildings a...IRJET Journal
This document discusses seismic pounding between irregular adjacent buildings and mitigation measures. It analyzes the pounding response of irregular H-shaped and tube-shaped buildings of equal height but varying numbers of floors (G+12 and G+8) separated by 150mm, using nonlinear link elements in ETABS software. Fluid viscous dampers and plastic friction dampers are proposed as mitigation measures to reduce structural response and displacements. The study found maximum impact forces of 195,256kN and 141,692kN occurred between the H-shaped and tube-shaped buildings respectively due to insufficient separation gaps to accommodate their out-of-phase oscillations during ground motion.
Similar to Comparative Study on Regular and Irregular RC Structures Under Far and Near Field Ground Motion with Base Isolation (20)
TUNNELING IN HIMALAYAS WITH NATM METHOD: A SPECIAL REFERENCES TO SUNGAL TUNNE...IRJET Journal
1) The document discusses the Sungal Tunnel project in Jammu and Kashmir, India, which is being constructed using the New Austrian Tunneling Method (NATM).
2) NATM involves continuous monitoring during construction to adapt to changing ground conditions, and makes extensive use of shotcrete for temporary tunnel support.
3) The methodology section outlines the systematic geotechnical design process for tunnels according to Austrian guidelines, and describes the various steps of NATM tunnel construction including initial and secondary tunnel support.
STUDY THE EFFECT OF RESPONSE REDUCTION FACTOR ON RC FRAMED STRUCTUREIRJET Journal
This study examines the effect of response reduction factors (R factors) on reinforced concrete (RC) framed structures through nonlinear dynamic analysis. Three RC frame models with varying heights (4, 8, and 12 stories) were analyzed in ETABS software under different R factors ranging from 1 to 5. The results showed that displacement increased as the R factor decreased, indicating less linear behavior for lower R factors. Drift also decreased proportionally with increasing R factors from 1 to 5. Shear forces in the frames decreased with higher R factors. In general, R factors of 3 to 5 produced more satisfactory performance with less displacement and drift. The displacement variations between different building heights were consistent at different R factors. This study evaluated how R factors influence
A COMPARATIVE ANALYSIS OF RCC ELEMENT OF SLAB WITH STARK STEEL (HYSD STEEL) A...IRJET Journal
This study compares the use of Stark Steel and TMT Steel as reinforcement materials in a two-way reinforced concrete slab. Mechanical testing is conducted to determine the tensile strength, yield strength, and other properties of each material. A two-way slab design adhering to codes and standards is executed with both materials. The performance is analyzed in terms of deflection, stability under loads, and displacement. Cost analyses accounting for material, durability, maintenance, and life cycle costs are also conducted. The findings provide insights into the economic and structural implications of each material for reinforcement selection and recommendations on the most suitable material based on the analysis.
Effect of Camber and Angles of Attack on Airfoil CharacteristicsIRJET Journal
This document discusses a study analyzing the effect of camber, position of camber, and angle of attack on the aerodynamic characteristics of airfoils. Sixteen modified asymmetric NACA airfoils were analyzed using computational fluid dynamics (CFD) by varying the camber, camber position, and angle of attack. The results showed the relationship between these parameters and the lift coefficient, drag coefficient, and lift to drag ratio. This provides insight into how changes in airfoil geometry impact aerodynamic performance.
A Review on the Progress and Challenges of Aluminum-Based Metal Matrix Compos...IRJET Journal
This document reviews the progress and challenges of aluminum-based metal matrix composites (MMCs), focusing on their fabrication processes and applications. It discusses how various aluminum MMCs have been developed using reinforcements like borides, carbides, oxides, and nitrides to improve mechanical and wear properties. These composites have gained prominence for their lightweight, high-strength and corrosion resistance properties. The document also examines recent advancements in fabrication techniques for aluminum MMCs and their growing applications in industries such as aerospace and automotive. However, it notes that challenges remain around issues like improper mixing of reinforcements and reducing reinforcement agglomeration.
Dynamic Urban Transit Optimization: A Graph Neural Network Approach for Real-...IRJET Journal
This document discusses research on using graph neural networks (GNNs) for dynamic optimization of public transportation networks in real-time. GNNs represent transit networks as graphs with nodes as stops and edges as connections. The GNN model aims to optimize networks using real-time data on vehicle locations, arrival times, and passenger loads. This helps increase mobility, decrease traffic, and improve efficiency. The system continuously trains and infers to adapt to changing transit conditions, providing decision support tools. While research has focused on performance, more work is needed on security, socio-economic impacts, contextual generalization of models, continuous learning approaches, and effective real-time visualization.
Structural Analysis and Design of Multi-Storey Symmetric and Asymmetric Shape...IRJET Journal
This document summarizes a research project that aims to compare the structural performance of conventional slab and grid slab systems in multi-story buildings using ETABS software. The study will analyze both symmetric and asymmetric building models under various loading conditions. Parameters like deflections, moments, shears, and stresses will be examined to evaluate the structural effectiveness of each slab type. The results will provide insights into the comparative behavior of conventional and grid slabs to help engineers and architects select appropriate slab systems based on building layouts and design requirements.
A Review of “Seismic Response of RC Structures Having Plan and Vertical Irreg...IRJET Journal
This document summarizes and reviews a research paper on the seismic response of reinforced concrete (RC) structures with plan and vertical irregularities, with and without infill walls. It discusses how infill walls can improve or reduce the seismic performance of RC buildings, depending on factors like wall layout, height distribution, connection to the frame, and relative stiffness of walls and frames. The reviewed research paper analyzes the behavior of infill walls, effects of vertical irregularities, and seismic performance of high-rise structures under linear static and dynamic analysis. It studies response characteristics like story drift, deflection and shear. The document also provides literature on similar research investigating the effects of infill walls, soft stories, plan irregularities, and different
This document provides a review of machine learning techniques used in Advanced Driver Assistance Systems (ADAS). It begins with an abstract that summarizes key applications of machine learning in ADAS, including object detection, recognition, and decision-making. The introduction discusses the integration of machine learning in ADAS and how it is transforming vehicle safety. The literature review then examines several research papers on topics like lightweight deep learning models for object detection and lane detection models using image processing. It concludes by discussing challenges and opportunities in the field, such as improving algorithm robustness and adaptability.
Long Term Trend Analysis of Precipitation and Temperature for Asosa district,...IRJET Journal
The document analyzes temperature and precipitation trends in Asosa District, Benishangul Gumuz Region, Ethiopia from 1993 to 2022 based on data from the local meteorological station. The results show:
1) The average maximum and minimum annual temperatures have generally decreased over time, with maximum temperatures decreasing by a factor of -0.0341 and minimum by -0.0152.
2) Mann-Kendall tests found the decreasing temperature trends to be statistically significant for annual maximum temperatures but not for annual minimum temperatures.
3) Annual precipitation in Asosa District showed a statistically significant increasing trend.
The conclusions recommend development planners account for rising summer precipitation and declining temperatures in
P.E.B. Framed Structure Design and Analysis Using STAAD ProIRJET Journal
This document discusses the design and analysis of pre-engineered building (PEB) framed structures using STAAD Pro software. It provides an overview of PEBs, including that they are designed off-site with building trusses and beams produced in a factory. STAAD Pro is identified as a key tool for modeling, analyzing, and designing PEBs to ensure their performance and safety under various load scenarios. The document outlines modeling structural parts in STAAD Pro, evaluating structural reactions, assigning loads, and following international design codes and standards. In summary, STAAD Pro is used to design and analyze PEB framed structures to ensure safety and code compliance.
A Review on Innovative Fiber Integration for Enhanced Reinforcement of Concre...IRJET Journal
This document provides a review of research on innovative fiber integration methods for reinforcing concrete structures. It discusses studies that have explored using carbon fiber reinforced polymer (CFRP) composites with recycled plastic aggregates to develop more sustainable strengthening techniques. It also examines using ultra-high performance fiber reinforced concrete to improve shear strength in beams. Additional topics covered include the dynamic responses of FRP-strengthened beams under static and impact loads, and the performance of preloaded CFRP-strengthened fiber reinforced concrete beams. The review highlights the potential of fiber composites to enable more sustainable and resilient construction practices.
Survey Paper on Cloud-Based Secured Healthcare SystemIRJET Journal
This document summarizes a survey on securing patient healthcare data in cloud-based systems. It discusses using technologies like facial recognition, smart cards, and cloud computing combined with strong encryption to securely store patient data. The survey found that healthcare professionals believe digitizing patient records and storing them in a centralized cloud system would improve access during emergencies and enable more efficient care compared to paper-based systems. However, ensuring privacy and security of patient data is paramount as healthcare incorporates these digital technologies.
Review on studies and research on widening of existing concrete bridgesIRJET Journal
This document summarizes several studies that have been conducted on widening existing concrete bridges. It describes a study from China that examined load distribution factors for a bridge widened with composite steel-concrete girders. It also outlines challenges and solutions for widening a bridge in the UAE, including replacing bearings and stitching the new and existing structures. Additionally, it discusses two bridge widening projects in New Zealand that involved adding precast beams and stitching to connect structures. Finally, safety measures and challenges for strengthening a historic bridge in Switzerland under live traffic are presented.
React based fullstack edtech web applicationIRJET Journal
The document describes the architecture of an educational technology web application built using the MERN stack. It discusses the frontend developed with ReactJS, backend with NodeJS and ExpressJS, and MongoDB database. The frontend provides dynamic user interfaces, while the backend offers APIs for authentication, course management, and other functions. MongoDB enables flexible data storage. The architecture aims to provide a scalable, responsive platform for online learning.
A Comprehensive Review of Integrating IoT and Blockchain Technologies in the ...IRJET Journal
This paper proposes integrating Internet of Things (IoT) and blockchain technologies to help implement objectives of India's National Education Policy (NEP) in the education sector. The paper discusses how blockchain could be used for secure student data management, credential verification, and decentralized learning platforms. IoT devices could create smart classrooms, automate attendance tracking, and enable real-time monitoring. Blockchain would ensure integrity of exam processes and resource allocation, while smart contracts automate agreements. The paper argues this integration has potential to revolutionize education by making it more secure, transparent and efficient, in alignment with NEP goals. However, challenges like infrastructure needs, data privacy, and collaborative efforts are also discussed.
A REVIEW ON THE PERFORMANCE OF COCONUT FIBRE REINFORCED CONCRETE.IRJET Journal
This document provides a review of research on the performance of coconut fibre reinforced concrete. It summarizes several studies that tested different volume fractions and lengths of coconut fibres in concrete mixtures with varying compressive strengths. The studies found that coconut fibre improved properties like tensile strength, toughness, crack resistance, and spalling resistance compared to plain concrete. Volume fractions of 2-5% and fibre lengths of 20-50mm produced the best results. The document concludes that using a 4-5% volume fraction of coconut fibres 30-40mm in length with M30-M60 grade concrete would provide benefits based on previous research.
Optimizing Business Management Process Workflows: The Dynamic Influence of Mi...IRJET Journal
The document discusses optimizing business management processes through automation using Microsoft Power Automate and artificial intelligence. It provides an overview of Power Automate's key components and features for automating workflows across various apps and services. The document then presents several scenarios applying automation solutions to common business processes like data entry, monitoring, HR, finance, customer support, and more. It estimates the potential time and cost savings from implementing automation for each scenario. Finally, the conclusion emphasizes the transformative impact of AI and automation tools on business processes and the need for ongoing optimization.
Multistoried and Multi Bay Steel Building Frame by using Seismic DesignIRJET Journal
The document describes the seismic design of a G+5 steel building frame located in Roorkee, India according to Indian codes IS 1893-2002 and IS 800. The frame was analyzed using the equivalent static load method and response spectrum method, and its response in terms of displacements and shear forces were compared. Based on the analysis, the frame was designed as a seismic-resistant steel structure according to IS 800:2007. The software STAAD Pro was used for the analysis and design.
Cost Optimization of Construction Using Plastic Waste as a Sustainable Constr...IRJET Journal
This research paper explores using plastic waste as a sustainable and cost-effective construction material. The study focuses on manufacturing pavers and bricks using recycled plastic and partially replacing concrete with plastic alternatives. Initial results found that pavers and bricks made from recycled plastic demonstrate comparable strength and durability to traditional materials while providing environmental and cost benefits. Additionally, preliminary research indicates incorporating plastic waste as a partial concrete replacement significantly reduces construction costs without compromising structural integrity. The outcomes suggest adopting plastic waste in construction can address plastic pollution while optimizing costs, promoting more sustainable building practices.
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressionsVictor Morales
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
Introduction- e - waste – definition - sources of e-waste– hazardous substances in e-waste - effects of e-waste on environment and human health- need for e-waste management– e-waste handling rules - waste minimization techniques for managing e-waste – recycling of e-waste - disposal treatment methods of e- waste – mechanism of extraction of precious metal from leaching solution-global Scenario of E-waste – E-waste in India- case studies.
6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
6th International Conference on Machine Learning & Applications (CMLA 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications of on Machine Learning & Applications.
A SYSTEMATIC RISK ASSESSMENT APPROACH FOR SECURING THE SMART IRRIGATION SYSTEMSIJNSA Journal
The smart irrigation system represents an innovative approach to optimize water usage in agricultural and landscaping practices. The integration of cutting-edge technologies, including sensors, actuators, and data analysis, empowers this system to provide accurate monitoring and control of irrigation processes by leveraging real-time environmental conditions. The main objective of a smart irrigation system is to optimize water efficiency, minimize expenses, and foster the adoption of sustainable water management methods. This paper conducts a systematic risk assessment by exploring the key components/assets and their functionalities in the smart irrigation system. The crucial role of sensors in gathering data on soil moisture, weather patterns, and plant well-being is emphasized in this system. These sensors enable intelligent decision-making in irrigation scheduling and water distribution, leading to enhanced water efficiency and sustainable water management practices. Actuators enable automated control of irrigation devices, ensuring precise and targeted water delivery to plants. Additionally, the paper addresses the potential threat and vulnerabilities associated with smart irrigation systems. It discusses limitations of the system, such as power constraints and computational capabilities, and calculates the potential security risks. The paper suggests possible risk treatment methods for effective secure system operation. In conclusion, the paper emphasizes the significant benefits of implementing smart irrigation systems, including improved water conservation, increased crop yield, and reduced environmental impact. Additionally, based on the security analysis conducted, the paper recommends the implementation of countermeasures and security approaches to address vulnerabilities and ensure the integrity and reliability of the system. By incorporating these measures, smart irrigation technology can revolutionize water management practices in agriculture, promoting sustainability, resource efficiency, and safeguarding against potential security threats.