考虑铅芯温度效应的橡胶支座参数影响分析

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (10) : 182-189.

论文

考虑铅芯温度效应的橡胶支座参数影响分析

秦川1 ，刘文光 1,，何文福 1，杨巧荣 1

作者信息 +

Comparative Analysis of Lead Heating Effects on Lead Rubber Bearing Behaviours

Chuan Qin 1 Wenguang Liu1 Wenfu He 1 Qiaorong Yang 1

Author information +

文章历史 +

摘要

对铅芯橡胶支座试验中支座力学性能参数的不同确定方法进行比较，并考虑温度效应对支座铅芯屈服应力影响，采用修正双线性支座模型比较了考虑铅芯温度效应前后支座的累积塑性变形需求，在此基础上选用多条地震动实测记录分析铅芯温度效应对隔震支座力学性能和地震响应的影响，结果表明地震作用下铅芯随着塑性变形的累积和地震能量的耗散温度不断变化，三组不同场地波作用下铅芯屈服应力随着地震动输入的增大均呈现下降趋势，对于中硬土和基岩场地，铅芯屈服应力的国内规范取值较实际计算值偏小，导致支座位移响应的高估和支座剪力响应的低估，不能有效预测地震作用下隔震支座及结构真实地震响应。

Abstract

This paper presents a comparison of different evaluation approaches on lead rubber bearing (LRB) behaviors through horizontal shear tests. Compared to constant lead yield stress value, cumulative plastic deformation demands on LRBs arise obviously with lead core heating effects considered. Nonlinear response history analyses were performed to study lead core heating effects on LRB behaviors and seismic responses, using three sets of ground motions classified according to their site categories. The results demonstrate that lead yield stresses decrease apparently with seismic input level arises in all three motion sets, while plastic deformation cumulating and lead core temperature arising. It is also revealed that, for medium hard site and rock site, Chinese code value of lead core yield stress is less than seismic analysis values, which leads to overestimate of bearing displacement responses and underestimate of shear force responses, and accurate seismic responses could not be predicted using it.

导出引用

秦川1,刘文光 1,，何文福 1，杨巧荣 1. 考虑铅芯温度效应的橡胶支座参数影响分析[J]. 振动与冲击, 2017, 36(10): 182-189

Chuan Qin 1 Wenguang Liu1 Wenfu He 1 Qiaorong Yang 1. Comparative Analysis of Lead Heating Effects on Lead Rubber Bearing Behaviours[J]. Journal of Vibration and Shock, 2017, 36(10): 182-189

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