Assessment of Ecp 203-07 Seismic Response Modification Factor of Reinforced Concrete Framed Structures
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8th International Scientific Conference on Applied Sciences and Engineering 2-3 April, 2016 Hotel Istana Kuala Lumpur City Centre, Kuala Lumpur, Malaysia
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A Seismic design is aimed at controlling the structural damage based on precise estimations of proper response
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is likely to experience, considering uncertainties inherent in the quantification of potential hazard and
uncertainties in assessment of the actual building response. It is an interactive process that begins with the
selection of performance objectives, followed by the development of a preliminary design, an assessment as to
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A Seismic design is aimed at controlling the structural damage based on precise estimations of proper response
parameters. Seismic design explicitly evaluates how a building is likely to perform; given the potential hazard it
is likely to experience, considering uncertainties inherent in the quantification of potential hazard and
uncertainties in assessment of the actual building response. It is an interactive process that begins with the
selection of performance objectives, followed by the development of a preliminary design, an assessment as to
whether or not the design meets the performance objectives, and finally redesign and reassessment, if required,
until the desired performance level is achieved.
In this present study one R.C. buildings, of G + 2 storey institutional building (designed according to IS
456:2000) are analysed. Analysis and redesigning by changing the main reinforcement of various frame
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located in Zone-II have been analyzed. The results of analysis are compared in terms of reinforcement in the
column and beam. The best possible combination of reinforcement that is economical, effective and whose
damage is limited to Grade 2 (slight structural damage, moderate non structural damage) in order to enable
Immediate Occupancy is determined and is termed as Seismic Design.
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This decision making process has three primary shortfalls.
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Seismic Performance of RC Frame Building with Different Position of Shear Wall
An earthquake force is a very strange force and behaves quite differently than Gravity and Wind loads, striking the weakest spot in the whole three dimensional structure. It’s not earthquake that kills, in fact ignorance in design and poor quality construction results in many weaknesses in the structure that cause serious damage to life and property. Masonry Infill are frequently used to fill the gap between the vertical and horizontal resisting elements of the building frames with the assumption that these in fills will not take part in resisting any kind of load either axial or lateral. Hence, its significance in the analysis is generally neglected by the designer. In fact, infill wall and shear wall considerably enhance the rigidity and strength of the frame structure. Various researches suggest that the bare frame has comparatively lesser stiffness and strength than the infill frame and frame with shear wall, therefore their ignorance cause failure of many multistorey buildings when subjected to seismic loads. In the present study, the finite element analysis of RC frame models viz. a bare frame a frame with shear wall considering infill a bare frame with shear wall has been carried out and the number of storeys vary as G 3, G 5, G 7 and G 9. Linear analysis of all RC frame structures has been performed as per IS 1893 Part 1 2002 and IS 456 2000. In this study only in plane stiffness of masonry wall has been considered and infill panels modelled as equivalent diagonal strut elements. The behaviour of buildings subjected to Gravity and Seismic loads with the help of Response Spectrum Analysis using FEM based software and the effect on Time Period, Mass Participation factor, and Storey Drift has been observed. Strength and Rigidity of RC bare frame structures is found increasing after the inclusion of infill panels and shear wall. Bharath V B | Kuldeep Singh Solanki | Aashutosh Raj Yadav "Seismic Performance of RC Frame Building with Different Position of Shear Wall" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-5 , August 2020, URL: https://www.ijtsrd.com/papers/ijtsrd31728.pdf Paper Url :https://www.ijtsrd.com/engineering/civil-engineering/31728/seismic-performance-of-rc-frame-building-with-different-position-of-shear-wall/bharath-v-b
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This document summarizes research on the seismic design of open ground storey framed buildings. It discusses how open ground storey buildings are vulnerable in earthquakes due to soft-storey behavior. The document reviews various studies on seismic analysis of irregular buildings using software like ETABS. It is proposed to conduct time history analysis of multi-storey reinforced concrete buildings considering mass irregularity at different floor levels to understand seismic response. The conclusion discusses how seismic analysis is important for structures and how responses can be reduced by adding shear walls or base isolation.
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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.
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2) It may not allow engineers to carryout designs at the least cost.
3) Comparison of framing systems may not address the specific building types.
This investigation proposes a prototype cost-effective model for selecting either a skeleton framing system or skeleton frame with bracing system for steel structural frames. A model for selecting cost-effective skeleton framing system or skeleton frame with bracing system will be a valuable tool for all decision makers. Engineers, in particular, will be able to select optimal steel framing faster, thus reducing design time and iterations. Furthermore, selection of economic framing system will also result in direct cost savings for steel structural frames.
The study involves the design and cost estimation of steel frames representing skeleton framing system and skeleton frame with bracingsystem. The cost effectiveness of the framing systems are compared based on lateral displacement requirements and cost.The preferred framing system should meet lateral displacement requirements and is lower in cost. The results of this pilot study showed that the Skelton framing system with bracing is the cost-effective choice for 30storeys steel space frames at wind speeds of 55m/sec, 50m/sec and 47m/sec.
Keywords: Bracings, SFS (Skeleton framing system), SFWB (Skeleton frame with bracing system) etc…
SEISMIC RESPONSE ANALYSIS OF LINKED TWIN TALL BUILDINGS WITH STRUCTURAL COUPLING
Effect of structural links on seismic responses for a linked building system
has been investigated in this paper by using finite element modeling technique.
The linked building system in this study is represented by twin 40-story
reinforced concrete frame-wall structures horizontally coupled by structural
links. It is assumed that the two adjacent buildings were similar in this linked
building system, so the two adjacent stories could be linked at the same height
by an inter-building link. The linked building system is modeled as a rigid
floor diaphragm for towers and as a beam for each link fixedly linked to the
perimeter structural framework of the buildings. By employing earthquake
time history excitation, the seismic responses of the twin towers were
computed at different locations for the link. The responses of structures were
evaluated and compared. The analysis outcomes indicated that the link could
effectively change the structural responses of the linked building system
STUDY THE EFFECT OF RESPONSE REDUCTION FACTOR ON RC FRAMED STRUCTURE
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
Performance based seismic design of the multi-storied reinforced concrete bui...
The document discusses performance-based seismic design of multi-story reinforced concrete buildings. It provides a literature review of previous studies that have analyzed buildings using nonlinear static pushover analysis to evaluate seismic performance. The goal of performance-based seismic design is to carefully assess how a structure will perform under earthquake loads by identifying performance objectives and evaluating the structure's capacity through nonlinear analysis. Previous studies have found that performance metrics like story displacement, drift, and base shear can be used to evaluate if a design meets life safety or other performance objectives. The document concludes that further research on nonlinear dynamic analysis and energy dissipation systems could help improve seismic performance estimation of reinforced concrete structures.
BEHAVIOR OF TALL MASONRY CHIMNEYS UNDER WIND LOADINGS USING CFD TECHNIQUE
This document discusses using computational fluid dynamics (CFD) to analyze wind-induced responses of tall masonry chimneys. It first reviews previous research using both experimental and numerical methods like CFD to study the effects of building design on aerodynamic forces. The document then describes how CFD and the finite volume method can be applied to model airflow and calculate drag forces on chimneys. Lastly, it notes that CFD simulations require expertise and proper modeling of factors like turbulence, and that various elements of a building's design impact its experience of wind loads.
IRJET- Effects of Different Reinforcement Schemes and Column Shapes on the Re...
This document discusses a numerical study that investigated the effects of different reinforcement schemes and column shapes on the blast resistance of reinforced concrete columns. The study used finite element analysis to model RC columns with varying transverse reinforcement spacing, axial load levels, column shapes, and longitudinal reinforcement arrangements. The results showed that transverse reinforcement spacing, axial loading, and column shape significantly affected the behavior of RC columns under blast loading, with more closely spaced transverse reinforcement and circular columns displaying higher blast resistance. The longitudinal reinforcement arrangement also influenced column response to blast loading at low scaled distances. The study aims to improve understanding of RC column behavior under blast loading to inform more blast-resistant design.
Evaluation of Response Reduction Factor for Moment Resisting Steel Frames- A ...
This document reviews the evaluation of response reduction factors for steel moment resisting frames through non-linear modeling and analysis. It begins with an abstract that outlines the objectives and methodology of using non-linear static analysis in SAP2000 to evaluate response reduction factors and compare them to code requirements considering different seismic zones and ground motions. It then provides background on moment resisting frames and the concept of response reduction factors. The document describes the non-linear modeling and pushover analysis methodology used. It also reviews previous literature on evaluating response reduction factors for steel frames and the factors that influence the values, such as number of stories, bracing type, and boundary conditions.
Progressive Collapse Analysis of Low Rise Steel Frame Structure With and With...
The document analyzes the progressive collapse of low-rise steel frame structures with and without bracing systems. Progressive collapse is when one local structural failure causes additional collapse in a disproportionate manner. The study uses linear static analysis based on GSA-2013 guidelines to assess progressive collapse potential. A 5-story and 10-story steel frame is modeled and analyzed with the sudden removal of columns at different locations. Results show bracing systems help minimize progressive collapse by providing alternate load paths, as measured by demand capacity ratios, joint displacements, member forces, etc. being lower when braces are included.
Seismic Performance of RC Frame Building with Different Position of Shear Wall
An earthquake force is a very strange force and behaves quite differently than Gravity and Wind loads, striking the weakest spot in the whole three dimensional structure. It’s not earthquake that kills, in fact ignorance in design and poor quality construction results in many weaknesses in the structure that cause serious damage to life and property. Masonry Infill are frequently used to fill the gap between the vertical and horizontal resisting elements of the building frames with the assumption that these in fills will not take part in resisting any kind of load either axial or lateral. Hence, its significance in the analysis is generally neglected by the designer. In fact, infill wall and shear wall considerably enhance the rigidity and strength of the frame structure. Various researches suggest that the bare frame has comparatively lesser stiffness and strength than the infill frame and frame with shear wall, therefore their ignorance cause failure of many multistorey buildings when subjected to seismic loads. In the present study, the finite element analysis of RC frame models viz. a bare frame a frame with shear wall considering infill a bare frame with shear wall has been carried out and the number of storeys vary as G 3, G 5, G 7 and G 9. Linear analysis of all RC frame structures has been performed as per IS 1893 Part 1 2002 and IS 456 2000. In this study only in plane stiffness of masonry wall has been considered and infill panels modelled as equivalent diagonal strut elements. The behaviour of buildings subjected to Gravity and Seismic loads with the help of Response Spectrum Analysis using FEM based software and the effect on Time Period, Mass Participation factor, and Storey Drift has been observed. Strength and Rigidity of RC bare frame structures is found increasing after the inclusion of infill panels and shear wall. Bharath V B | Kuldeep Singh Solanki | Aashutosh Raj Yadav "Seismic Performance of RC Frame Building with Different Position of Shear Wall" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-5 , August 2020, URL: https://www.ijtsrd.com/papers/ijtsrd31728.pdf Paper Url :https://www.ijtsrd.com/engineering/civil-engineering/31728/seismic-performance-of-rc-frame-building-with-different-position-of-shear-wall/bharath-v-b
IRJET- Seismic Evolution of Soft Storeyed Structures When Exposed to Earth Qu...
This document summarizes a study on strengthening soft-story buildings to improve their seismic performance. Soft-story buildings, which have open or weaker first floors, perform poorly in earthquakes. The study models an 8-story reinforced concrete building under different structural configurations, including bare frame, infill masonry walls, shear walls, and bracing systems. Nonlinear static pushover analysis is used to evaluate the capacity and seismic response of each model. The results show that including infill walls, shear walls or bracing systems increases the building's lateral stiffness and decreases its fundamental natural period compared to the bare frame model. Strengthening the ground floor improves the seismic resistance of soft-story buildings.
A Review of “Seismic Response of RC Structures Having Plan and Vertical Irreg...
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
IRJET- Review Paper on Convincement based Seismic Design of Open Ground Store...
This document summarizes research on the seismic design of open ground storey framed buildings. It discusses how open ground storey buildings are vulnerable in earthquakes due to soft-storey behavior. The document reviews various studies on seismic analysis of irregular buildings using software like ETABS. It is proposed to conduct time history analysis of multi-storey reinforced concrete buildings considering mass irregularity at different floor levels to understand seismic response. The conclusion discusses how seismic analysis is important for structures and how responses can be reduced by adding shear walls or base isolation.
“Static &dynamic analysis of multistory building using
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.
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Liberal Approach to the Study of Indian Politics.pdf
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Assessment of Ecp 203-07 Seismic Response Modification Factor of Reinforced Concrete Framed Structures
- 1. Abstract of Applied Sciences and Engineering, 2016, Vol.8 ISSN: 2415-2072 DOI: 10.18488/journal.1001/2016.8/1001.8 8th International Scientific Conference on Applied Sciences and Engineering 2-3 April, 2016 Hotel Istana Kuala Lumpur City Centre, Kuala Lumpur, Malaysia Conference Website: www.scihost.org 6 Paper ID: 14/16/ 8 th ISCASE Assessment of Ecp 203-07 Seismic Response Modification Factor of Reinforced Concrete Framed Structures Ramadan. M1 --- Salem. H2 1 Teaching Assistant, Structural Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt. 2 Professor, Structural Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt. Abstract The inelastic design seismic forces are generally calculated equal to corresponding elastic ones divided by response reduction factor (R), that depends on structural Ductility, Over-Strength, and Redundancy. Many studies have attempt to quantify the potential of structural systems to delimit the level of force imposed by virtue of their ductility and energy absorption capacity. Most of practice design codes give values of (R) factor for a building as function of its structural system only excluding the effect of important factors such as: the geometrical configuration, reinforcement ratio, concrete strength, yielding stress of reinforcement, and earthquake magnitude. A parametric study was conducted to investigate the effect of those parameters on RC Ductile Frames Structures using Applied Element Method, where a nonlinear dynamic analysis was carried out in the time domain for multistory reinforced concrete framed structures. Results showed that (R) factor is greatly affected by earthquake magnitude, moderate effect by geometrical configuration, and material properties. The results also showed the (R) factors recommended in current design codes are unconservative and over estimated for the majority of studied cases. Keywords: Response modification factor, Seismic design, Ductility, Over-strength, Design spectrum, Non- linear analysis. Presenter Information Name: Moustafa Mohamed Mohamed Ramadan Affiliation: Teaching Assistant, Structural Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt