Development of Modified Ibarra–Krawinkler Deterioration Model for One-Story Steel Plate Shear Wall

Nowadays, steel plate shear wall is considered as a suitable system for conventional lateral load resisting systems, because of high post buckling strength, significant ductility, stable hysteresis characteristics and high initial stiffness. Although early experimental and analytical research on steel shear wall clarified various aspects of seismic behavior of such system, but still several issues such as deterioration behavior of the system require more investigation on the subject. Like any other structures, in order to investigate the performance of steel plate shear wall (SPSW) comprehensively, its nonlinear behavior should be assessed in a wide range. In this study, based on the modified Ibarra–Krawinkler deterioration model, new equations are proposed in order to provide an acceptable prediction of nonlinear cyclic behavior of one-story SPSWs with hinged-joints. For this purpose, a number of 60 SPSWs were numerically modeled and analyzed and the modified Ibarra–Krawinkler deterioration model parameters were calibrated and pertinent parameters were identified. Then, using statistical regression analysis, the behavioral equations are presented; in which displayed an acceptable level for prediction of cyclic performance of SPSW system.