Design And Performance Study Of Double-order-yielding Buckling Restrained Wall

As a kind of seismic component with superior performance,BRW is often used as the main lateral force resisting component of multi-storey and high-rise structures.However,the yield displacement of BRW is large,and the energy dissipation core plate is still in elastic state in the small deformation stage,and cannot enter the plastic energy dissipation stage.In this paper,a Double-order-yielding Buckling restrained Wall(DBRW)is designed,which is composed of BRW and WFD.The dbrw has small sliding displacement and parallel connection with BRW,which solves the problem that BRW can't consume energy in small deformation.Based on the back and forth experiments of WFD,the key mechanical parameters are determined,and the calculation model of BRW and the calculation formula of each parameter are derived theoretically.The hysteretic characteristic,skeleton curve and energy dissipation characteristic of DBRW are obtained by finite element analysis.The effects of yield displacement ratio and yield force ratio of WFD and BRW on DBRW performance are analyzed by structural dynamic analysis software,and a reasonable range of stiffness ratio is obtained.The results of seismic response analysis of frame structures with WFD,BRW and DBRW respectively show that DBRW can effectively reduce the seismic displacement response of each stage of the structure.