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Abstract
Steel plate shear wall (SPSW) has gained a lot of interest in the past few
decades as a lateral load resistant system for mid to high-rise buildings, especially in high seismic risks regions. SPSW are higher in strength and stiffuess and have better energy absorption capability. Yielding of the plate in the post buckling stage allows the system to dissipate significant amount of energy. However, reported investigations showed that relatively thin plates must be used to guarantee that the boundary columns will not fail before failure of the plate. In most cases, the required plate thickness is impractical or unavailable which may lead to use thicker plates than needed. Using thicker plates will increase the sizes of the boundary members, as well as, the foundation demands. The placement of a pattern of perforations in the infill plates to reduce the strength and stiffuess of the panel by a desired amount is considered a practical solution to this problem. There are few or limited information available about the behavior of SPSW with presence of perforations. The objective of this investigation is to study the behavior of SPSW behavior with the presence of perforations. An analytical model was presented and a parametric study was conducted to investigate the influence of each of the parameters governing the behavior of the wall. The analytical study was built using a nonlinear fini~e element software (ABAQUS), which was used to create a finite element model based on nonlinear dynamic explicit formulation. The study results showed that the shear capacity of SPSW can be reduced by the required degree if the infill plates of the wall are perforated with circular holes. In most cases, the reduction in shear strength is not accompanied by a major change in the overall deformation and ductility behavior of the wall. Based on the results of the study, an empirical equation was proposed to obtain the ultimate shear capacity of perforated SPSW. A numerical example was presented to illustrate the usage of the proposed equation.