Parametric Analysis on Hysteresis Performance and Restoring Force Model of LYP Steel Plate Shear Wall with Two-Side Connections

Parametric analysis on the hysteresis performance of the low yield point steel plate sheer wall (LYP SPSW) with three different stiffening configurations, including unstiffened, cross stiffened and diagonal stiffened, was conducted using the finite element models which have been verified by the test results. The parameters which have effects on the hysteretic behavior of LYP SPSW include ratio of height-to-thickness, stiffness ratio of stiffener, and the stiffness ratio of the edge member. The hysteretic curves, skeleton curves and viscous damping coefficient-displacement curves of SPSW with different stiffening configurations were obtained. According to the numerical results, it can be seen that the shear resistance and hysteretic performance of LYP SPSW decrease with the increase of the ratio of height-to-thickness. The energy dissipation capacity and shear capacity of LYP SPSW can be improved effectively by setting cross and diagonal stiffeners, but when the stiffness ratio of stiffener is greater than 10, the increase is no longer obvious. Furthermore, for steel plate shear walls without edge members, the diagonal cross-stiffening steel shear wall can achieve better energy consumption. For steel plate shear walls with edge members, when the ratio of height-to-thickness is less than 100, a better energy dissipation can be achieved by using cross stiffened steel plates; when the ratio of height-to-thickness is greater than or equal to 200, a better energy dissipation can be reflected by adopting cross stiffened steel plates. Finally, a restoring force model of the LYP SPSW with two-side connections is proposed.