Estimation of Lateral Force Contribution of Boundary Elements in Steel Plate Shear Wall Systems


Abstract eng:
Steel plate shear walls (SPSWs) are used as lateral force-resisting systems in new and retrofitted structures in high-seismic regions. Various international codes recommend the design of SPSWs assuming the entire lateral load to be resisted by the infill plates. Such a design procedure results in significant over-strength leading to uneconomical and inefficient use of materials. This study is focused on the estimation of contribution of boundary elements in resisting the lateral force considering their interaction with the web plates of SPSW systems. Initially, the relative contribution of web plates and boundary frames is computed for a single-bay single-story frame with varying rigidity and end connections of boundary elements. Nonlinear static analyses are carried out for the analytical models in OPENSEES platform to quantify this contribution. Later, this study is extended to the code-based designed 3-, 6- and 9-story SPSWs of varying aspect ratios. Based on the results obtained, a new design procedure is proposed taking the lateral strengths of the boundary frames into account. Nonlinear time-history analyses are conducted for forty recorded ground motions representing the DBE and MCE hazard levels to compare the interstory and residual drift response and yield mechanisms of SPSWs designed as per current practice and the proposed methodology. Finally, an expression has been proposed to predict the lateral force contribution of the infill plate and the boundary frame of SPSWs.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 2148.:
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