Seismic Behavior of Coupled Steel Plate Shear Wall with Variation of Opening Dimensions and Considering the Performance Levels

In recent years, Coupled Steel Plate Shear Wall system has been used in mid and high-rise buildings because it has advantages such as providing large spaces for creating various uses. So this was brought into the attention of the designers. The lateral structural response is exactly dependent on the shear walls behavior; therefor these elements must response well under different loading situation. So this paper aims to study the effects of near and far fault earthquakes on the two series of mid-rise frame with the steel plate shear wall with the coupling system. In both series, the coupled steel plate shear wall will be evaluated by variation of opening dimensions, one in length of 1 and 2 m and the width of 0.6 m and 0.9 m with regularity in the plan. Firstly, structures are modeled in ETABS software three dimensionally. Then, the axis frame is analysed in OpenSees two dimensionally. In this paper, the nonlinear static pushover and dynamic time history analyses are carried out. The results of nonlinear analyses show that by increasing the dimensions of the openings, the drift and absolute displacement of the stories are enhanced and also by decreasing the dimensions of the openings, the amount of stories shear and base shear are decreased, which indicates the great effect of the dimensions of the openings on the seismic behavior of coupled steel plate shear wall with considering the performance levels of the frame.