城市曲线连续梁桥减隔振支座地震响应分析

Seismic Response Analysis of Seismic Isolation Bearing of Urban Curved Continuous Beam Bridge

文章选取某城市曲线连续梁桥两联作为研究对象,研究铅芯橡胶支座对曲线桥的地震响应;通过有限元软件对某曲线连续梁桥进行建模分析,并以不同曲率半径的曲线梁桥进行同等条件对比分析,得出分别采用板式橡胶支座与铅芯橡胶支座的曲线桥在E2地震作用下的桥梁结构动力非线性时程分析的规律。分析结果表明,采用铅芯橡胶支座以后曲线桥的地震响应在整个激励过程中都显得比较平稳,无明显的峰值出现,并且有效地均衡和分配了曲线桥各个位置的地震响应。

Taking some urban curved continuous beam bridge as the research object, this paper studied the seismic response of the curved bridge with the lead rubber beating. It analyzed the modeling of the curved beam bridge created by finite element software, and obtained the law of nonlinear time history analysis of the bridge using the rubber bearing and the lead rubber bearing under the E2 seismic effect. The results showed that the seismic response of the curved bridge with the lead rubber bearing was very stable, without obvious peak in the whole process, and the LRB could balance and distribute effectively the seismic response of each position of the curved bridge.