考虑温度相关性的LRB隔震桥梁地震响应分析

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (9) : 40-45.

论文

考虑温度相关性的LRB隔震桥梁地震响应分析

胡紫东1,2; 李黎1,2; 聂肃非1,2

作者信息 +

Seismic response of isolated bridges including temperature effect

HU Zi-dong1,2; LI Li1,2; Nie Su-fei1,2

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摘要

系统的研究了铅芯橡胶隔震支座的温度相关性，以及支座温度相关性对隔震桥梁地震响应的影响。试验温度的变化范围为-40℃至50℃，通过拟静力试验的滞回曲线测定了支座在不同温度下的屈前刚度、屈后刚度和屈服剪力。根据所测得的试验数据，采用回归分析，得出了支座的温度影响相关系数函数。建立了LRB隔震桥梁的力学模型，分析了考虑支座温度相关性对隔震桥梁地震响应的影响。比较了不同温度下支座滞回的计算结果。对比分析了不同温度下，隔震梁桥墩顶剪力、梁位移和梁加速度的计算结果，得出了若不考虑支座的温度效应墩顶剪力和梁加速度会有较大的误差，而温度效应对梁位移影响较小的结论。

Abstract

The temperature properties of LRB used for isolated bridges are studied. The seismic response of isolated bridges including temperature effect are purposed. The range of temperature tests from -40℃ to 50℃, the characteristics of LRB under different temperature environmental conditions are measured by quasi-static testing. Base on experimental results, using regression analysis, the function of LRB correlated with temperature is derived. An numerical implementation of isolated bridges under seismic excitation which considered the effect of LRB is presented. The result of the lateral force-deformation of LRB is compared. From the comparative analysis of the result of pier shear、deck drift and deck acceleration, it is indicated that if temperature effect is unconsidered, pier shear and deck acceleration will have higher error and there is less influence of deck drift.

导出引用

胡紫东;李黎;聂肃非;. 考虑温度相关性的LRB隔震桥梁地震响应分析[J]. 振动与冲击, 2011, 30(9): 40-45

HU Zi-dong;LI Li;Nie Su-fei;. Seismic response of isolated bridges including temperature effect[J]. Journal of Vibration and Shock, 2011, 30(9): 40-45