采用减隔震装置后轨道交通高架桥的抗震性能分析

采用非线性有限元动力分析程序,分别对设置板式橡胶支座及铅芯橡胶支座的轨道交通高架桥梁结构进行了非线性动态时程地震响应分析。分析中考虑了减隔震支座的非线性特性以及长钢轨对轨道交通高架桥的纵向约束作用。结果表明,铅芯橡胶支座较板式橡胶支座具有更好的减隔震作用,长钢轨的纵向约束增加了桥梁结构反应内力。

Anti-seismic Capability of Railway Viaduct Bridges with Seismic Isolator

By adopting the non-linear dynamical procedure of finite element, this paper analyses rail transit bridges with rubber bearing or with lead rubber bearing separately, to observe the non-linear characteristic of isolated bearing and longitudinal restraint function on the viaduct rail transit of long rail. As the results indicate, lead rubber bearing has better seismic reduction and isolation than rubber bearing, the longitudinal restraint of the long rail has increased the internal force of the structure of viaduct bridges.