Cyclic response and parametric study of a self-centering coupled shear wall system with disc spring devices

Abstract

The use of the disc spring device (DSD) to provide a superior self-centering ability and ductility for shear walls has been investigated in both numerical simulation and pseudo-static cyclic loading tests. In the current study, the DSD is adopted to improve the resilience of the coupled shear walls. A finite element model of a present coupled shear wall is developed and verified by the experiment. Based on the prototype model, a model of the self-centering coupled shear wall system is built by installing two DSDs in the bottom corners of the wall piers. A parametric study is performed to provide a holistic evaluation on the effect of the stiffness, friction, and installation layout of the DSD. Results prove the resilience promotion of the traditional coupled shear wall by installing DSDs. The sufficient initial stiffness of DSDs can provide high overturning moment capacity and the second stiffness of DSDs is key in mitigating the residual displacement for the self-centering coupled shear wall. The friction between disc springs can enhance energy dissipation ability of the system. More installed DSDs would be beneficial for the ductility of the coupled shear walls.