characteristics of the wall-frame interaction in steel plate shear walls with perforated infill plates

The non-linear response of steel plate shear walls (spsws) with perforated infill plates are studied by considering the interaction effect between the frame and the infill plate. a number of single and 14-stories spsws with solid and perforated infill panels with different perforation ratios are studied numerically. the results are utilized to discuss (a) the influence of perforated ratio and placement of the holes on system behavior (b) changes in system strength, stiffness, damping ratio and ductility due to the introduction of perforation in infill panels, and (c) evaluate the change in behavior of low and high-rise structures by the introduction of perforations. the results reveal that the perforation ratio is not the only controlling factor in strength and ductility of the shear wall specimens, and the strength and ductility of spsw also depend upon the placement array of the perforations in the infill plate. the ultimate strength, ductility ratio and initial stiffness of the perforated spsws have been reduced to 28, 29 and 33.5% compared to the reference specimen, respectively. also, the values of normalized che and lhe and equivalent viscous damping ratio in perforated specimens reduced to about 28, 26 and 10%, respectively.