单向软钢隔震耗能支座的滞回性能研究  

Research of hysteretic behaviour of low yield point steel isolation bearing with H section

作　　者：丁磊[1] 舒赣平[2] 

机构地区：[1]浙江大学建筑设计研究院,杭州310028 [2]东南大学土木工程学院,南京210096

出　　处：《建筑结构》2013年第15期107-112,共6页Building Structure

摘　　要：基于ANSYS有限元软件,对于采用H形截面的软钢隔震耗能支座的滞回性能进行了支座腹板的宽厚比、轴压比和高宽比等多参数分析。其中尤以宽厚比对支座的耗能能力的影响最为显著,支座的极限剪应力和延性随着宽厚比的减小而增大,故较小的宽厚比可以有效地延缓支座腹板的屈曲变形,有利于支座隔震耗能性能的充分发挥。研究结果表明软钢隔震耗能支座的耗能能力优越,给出了工程中软钢隔震耗能支座的等效阻尼比的理论建议值,可供设计参考。The multi-parameter analysis of LYPB （low yield point steel isolation bearing） under the low cychc load was conducted by using finite element program ANSYS, and the major factors that impact energy-dissipation performance of LYPB are the bearing web plate flakiness ratio, axial compression ratio and depth-width ratio. The web plate flakiness ratio is the most major factor. The smaller web plate flakiness ratio can effectively inhibit and delay the web plate＇s buckling, exploit the energy dissipation advantages sufficiency of LYPB. The results show that LYPB has a good hysteretic energy dissipation performance, and the equivalent damping ratio of LYPB is proposed for design reference.

关 键 词：软钢 隔震支座 滞回性能 骨架曲线 等效阻尼比 

分 类 号：TU391[建筑科学—结构工程]