一种全域屈服型软钢阻尼器设计及性能模拟

Design and performance simulation of a fully yielding mild steel damperd

设计了一种可用于预制装配式混凝土框架结构梁柱节点的梁柱节点软钢阻尼器,对其耗能元件进行形状优化设计,得到全域屈服型耗能元件,并采用有限元软件ABAQUS对全域屈服型耗能元件及梁柱节点软钢阻尼器进行数值模拟分析。研究结果表明:在外部荷载的作用下,全域屈服型耗能元件在其预设耗能段上各截面同时达到初始屈服,当荷载逐步增大时,各截面内部的屈服区域逐步增大,直至各截面达到全截面屈服,提高了材料的利用率;梁柱节点软钢阻尼器的弯矩-转角滞回曲线饱满,耗能性能优良,其耗能能力与全域屈服型耗能元件的尺寸及布置位置有关。

A new type of mild steel damper for beam-column joint of precast concrete frame structures is designed,and the fully yielding energy dissipating cell in the damper is obtained by shape optimization of the energy dissipating cell.The fully yielding energy dissipating cell and the mild steel damper for beam-columnjoint are simulated and analyzed by finite element software ABAQUS.The results show that:under the action of external loads,all sections of the preset energy dissipation part of the fully yielding energy dissipating cell can yield at the same time.When the load increases gradually,the yield area in each section increases gradually until all sections yield,and the utilization ratio of materials is improved.The bending moment-rotation hysteretic curve of mild steel damper for beam-column joint is full,so the energy dissipation performance of the damper is great.The energy dissipation capacity of the damper is related to the size and arrangement of the fully yielding energy dissipating cells.