Comparative response assessment of different steel plate shear walls (SPSWs) under near-field ground motion

Steel plate shear walls (SPSWs) are widely used due to their high energy absorption and exceptional lateral resistance. However, the behavior of different infill panels varies, and their response under near-field seismic excitations is uncertain. To better understand how different infill panels contribute to seismic structural re-sponses, this paper presents findings from research conducted on different types of SPSWs. The study of different types of SPSWs with infill panel aspect ratios of 1:1 and 2:1 under cyclic loading was the first part of this parametric investigation, and the second part was the study of the structural response of 3D frames with an aspect ratio of 3:4:2 and a 1:1 infill panel under near-field ground motions. The results of energy dissipation, acceleration, and drift were compared. This study's goal was to better understand how various infill panels react to near-field ground motions and cyclic loading. With a 2:1 aspect ratio, unstiffened SPSWs reduced plastic dissipation by 78% while increasing lateral stiffness by 10%. With minimal peak transient and residual interstory drifts and effectively damped floor acceleration, unstiffened SPSW demonstrated the best viscous effect and dissipated 69.42% of the total system.