铅芯橡胶支座滞回特性的振动台试验研究

Shaking Table Test Study on Hysterical Properties of Lead Rubber Bearings

铅芯橡胶支座是一种常用的阻尼机构一体型隔震装置,其水平方向的滞回性能反映了该装置的耗能能力并影响整个隔震建筑的隔震效果,是隔震装置的一个关键指标。基于某铅芯橡胶支座基础隔震结构的模型振动台试验数据,对该隔震装置在不同地震加速度记录、不同地震强度、不同地震输入方向等各种工况下的滞回曲线进行了对比与分析,得到了一些有益的结论。

Lead rubber bearing is a common used damper-mechanism composite isolation device. Its horizontal hysterical property is a key index of the isolation device, and reflects the energy consumption capacity, and influences the seismic reduction effect of the whole isolated building. Based on the data of shaking table test of a lead rubber bearing base isolation structure, the hysterical loops of LRB of cases with different acceleration records, different earthquake intensities and different input directions were compared in this paper. And the study got some useful conclusions.