不同构造参数对圆环耗能器性能的影响分析

设计了13组不同构造参数的圆环耗能器,采用ABAQUS软件对安装在支撑框架结构中的圆环耗能器进行参数分析,研究圆环钢板厚度、圆环外直径、支撑角度、圆环钢板局部削弱形式和削弱深度对圆环耗能器性能的影响。研究结果表明：圆环耗能器滞回曲线稳定、饱满,塑性耗能能力强;随着圆环钢板厚度的增加或者圆环外直径的减小,圆环耗能器初始刚度和屈服力增大;支撑与横梁之间的角度对圆环耗能器性能有一定影响,交叉支撑角度宜取45°左右;圆环钢板局部削弱圆环耗能器比不削弱圆环耗能器具有更好的耗能效果;圆环钢板局部削弱形式宜采用圆弧式,且钢板削弱深度宜控制在圆环钢板宽度的20%~30%。

Performance Study on Ring Damper under Different Constitutional Parameters

Thirteen different models were designed to study the bearing capacity and the hysteretic performance of the ring damper installed in the braced frame. The constitutional parameters of the ring damper included the thickness of the ring plate,the diameter of ring,the angle of the brace,the weaken form and the weaken depth.All models were carried out in numerical simulation by ABAQUS.The analysis results showed that the ring damper had stable and full hysteretic curve,and posed excellent energy dissipation capacity.The initial stiffness and yield capacity of the ring damper improved with the thickness of the ring damper plate increased or the diameter of the ring decreased.The performance of the ring damper was influenced by the angle between brace and beam,and the angle should be about 45°.When the plate of the ring damper weakened partly,the ring damper showed better energy dissipation capacity.Compared with strip-weakened,the arc-weakened form was more reasonable for the ring damper,and the weakened depth of the ring plate should be controlled at 20%～30% of the ring plate width.