2种新型耗能器的特性分析及比较

Analysis and comparison of the characteristics of two kinds of energy dissipator

为对比分析2种适用于网壳的弧形钢棒金属耗能器的特性,对2种耗能器进行了低周往复荷载试验,并利用有限元软件建立模型,在比较实验结果与有限元计算结果的基础上分析了耗能器相关参数对耗能器性能的影响,在基于大量的仿真计算数据基础上确立了2款耗能器的恢复力模型,并研究其刚度退化规律;同时将耗能器布置于网壳中,分析了2者对网壳稳定性的影响。试验及分析表明:弧形钢棒直径对耗能器特性影响较大,双层弧形钢棒的耗能总体表现优于单层的耗能器。

Low cycle reciprocating load tests were exerted to two new kinds of arc steel rod energy dissipators which were suitable for reticulated shells.And the finite element models of the two dampers were made,on the base of comparing experimental results and finite element calculation results,the influence to the performance of the two energy dissipators of related parameters were analyzed. The restoring force model of two types of energy dissipator were made on the base of a lot of simulation data,and law of stiffness degradation were researched too. Then two kinds of dampers were set up in latticed shell,and the influence to latticed shell were researched.Test and analysis showed that the diameter of the arc steel rod has great influence on the characteristics of the energy dissipator,and the energy dissipation performance of double-layer arc steel bar was better than that of single layer arc steel rod damper.