Study on seismic behaviors of self-centering steel plate shear walls with slits

Abstract

The self-centering steel plate shear walls with slits(SC-SPSWS) is a new seismic load-resisting system that combines the good ductility, energy dissipation capacity of the steel plate shear walls with slits(SPSWS) and the recentering capabilities of the self-centering steel frames(SCSF). This paper presents the finite element analysis of SCSF under cyclic loading, the results correlate well with those from the experiments, which validates the modeling method and provides a reliable basis for modeling the whole system. A 2-story SC-SPSWS is established and analyzed to investigate the effect of individual changes in geometric parameters on lateral stiffness, ultimate bearing capacity, ductility, reset performance and energy dissipation capacity of the system. Results show that the structure with more flexural link layers and thicker steel plates owns higher ultimate bearing capacity and better energy dissipation capacity, but at the same time the recentering capability is weakened. It is also concluded that as the span-height decreases, the ductility of the structure decreases sharply. Differently, an increase in the number of steel strands can enhance the ductility of the structure