Seismic performance of stiffness enhanced metal coupling beam damper
In order to control the residual displacement of connected wall structures with connected beam metal dampers and promote the formation of the overall yield mode of the structure system,a metal damper based on the combination of sliding joints is proposed in this paper.The seismic performance of the damper is studied comprehensively by pseudo-static test,and the characteristics of the phased yield and stiffness enhancement are verified.The experimental results show that the damper can not only achieve the effect of step-by-step yield and stiffness enhancement,but also has good deformation capacity and energy dissipation performance,and can be optimized according to the parameters of slip distance and rectangular shear plate thickness.Further,a numerical comparison model of a new type of energy-dissipating beam-jointed wall structure system is established for dynamic time-history analysis.The results show that the proposed damper can control the residual displacement by strengthening the second-order stiffness in rare earthquakes,which is conducive to strengthening the collapse resistance of the structural system under extreme earthquakes and achieving the purpose of easy repair after extreme earthquakes.
万方数据
维普
