Buckling-Restrained Braces are widely used in bracedframe structure due to their excellent energy dissipation capabilities.However,they often exhibit unacceptable residual deformations after earthquakes,which can affect the repairability of the structure.To reduce the residual deformation in structures equipped with Buckling-Restrained Braces,this study proposes an economical novel self-centering buckling-restrained brace by paralleling a self-centering system with combination disc springs and tendons as self-centering elements based on Buckling-Restrained Braces to provide the restoring force.The structure and restoring force model of the nocel self-centering buckling-restrained brace are presented.Numerical simulation is then used to investigate the effects of the self-centering ratio and inner core size on the hysteretic performance.The results indicate that when the self-centering ratio is less than 1,an increase in the self-centering ratio by 66.67%leads to a reduction of 1 505.86%in the residual deformation of the brace,but its equivalent viscous damping ratio decreases by 19.21%.Additionally,under the same self-centering ratio,an augmentation of the inner core size by 90%results in an enhancement of 538.09%in the total hysteretic energy of the brace.
关键词
自复位防屈曲支撑/恢复力模型/数值模拟/残余变形/耗能能力
Key words
self-centering buckling-restrained brace/restoring force model/numerical simulation/residual deformation/energy dissi-pation capacity
维普
万方数据