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Modelling of framed shear walls for pushover analysis of reinforced concrete buildings
Published in Associated Cement Companies Ltd.
2014
Volume: 88
   
Issue: 5
Pages: 58 - 68
Abstract
Shear walls in buildings are efficient under seismic load in terms of providing lateral strength and stiffness. A framed shear wall consisting of panels in a frame, can be constructed in a new building or in an existing building for seismic retrofitting. Their contribution needs to be verified by appropriate non-linear analysis. The present study investigated the different options of modelling a reinforced concrete framed shear wall in a pushover analysis of a regular low-rise building. Pushover analyses were carried out using two computational models. The refined model was developed using multi-layered membrane elements for the wall panels. A simplified model was proposed with equivalent column elements for the framed wall. The shear hinge properties for the equivalent column elements were developed using the softened truss model. The in-plane normal stresses generated in the panels of the refined model, due to the framepanel interaction, were considered in the analysis by the softened truss model. The pushover curve from the simplified model was close to that from the refined model. The simplified model was conservative in terms of predicting the lateral strength. However, the deformability was overestimated as the local stress concentrations at the corners of the panels were neglected. It was observed that a simplified model without considering the normal stresses in the generation of shear hinge properties for the equivalent column elements, provided reasonable results. Since, the later model was computationally less intensive, it is expected to be suitable for professional practice. © 2014 ACC Limited.
About the journal
JournalIndian Concrete Journal
PublisherAssociated Cement Companies Ltd.
ISSN00194565
Open AccessNo
Concepts (13)
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    Concretes
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    Reinforced concrete
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    Seismology
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    Stress concentration
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    Computational model
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    IN-PLANE NORMAL STRESS
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    LOCAL STRESS CONCENTRATION
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    MEMBRANE ELEMENTS
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    PROFESSIONAL PRACTICES
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    PUSH-OVER ANALYSIS
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    Seismic retrofitting
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    SOFTENED TRUSS MODEL
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    Shear walls