铅芯叠层橡胶支座基础隔震结构双向地震反应分析

本文对铅芯叠层橡胶支座双向耦合恢复力模型进行了改进，采用基础隔震结构动力分析程序DABIS对铅芯叠层橡胶支座基础隔震结构进行了单向及双向地震反应对比分析。结果表明，在单向和双向地震作用下，基础隔震结构的加速度反应和位移反应较为接近，但在双向地震作用下，支座的最大位移明显大于单向地震作用时的支座最大位移，因而在确定支座最大位移时应考虑双向地震作用的影响。

Analysis of bilateral seismic response of base-isolated structures with lead rubber bearings

The bilateral coupled restoring force model of lead rubber bearings was improved. The comparing analysis of unilateral and bilateral seismic response of base-isolated structures with lead rubber bearings was carried out by the program of dynamic analysis of base-isolated structures (DABIS). It is found that the structural acceleration response and displacement response under bilateral inputs are similar to that under unilateral ground shaking, but the maximum displacement of the bearings under bilateral components is much larger than that under unilateral component. So that the influence of bilateral inputs should be considered when the maximum displacement of the bearings is ascertained.