高阻尼橡胶材料支座对曲线梁桥的减隔震研究

Study on seismic isolation of curved girder bridge with high damping rubber bearing

基于某曲线梁桥工程实例,利用有限元分析软件midas建立计算模型。通过两个正交的非线性水平弹簧模拟高阻尼橡胶材料支座(HDR)的双向非线性特性,选取具有代表性的地震波调幅后,对有无设置HDR支座的曲线梁桥分别进行三向地震波输入,并将地震响应结果进行比较。结果表明:HDR可以增大结构自振周期,有效地降低曲线梁桥的地震响应。

Based on a real example of a curved girder bridge,the finite element analysis software MIDAS is used to establish the calculation model.Two orthogonal nonlinear horizontal springs are used to analog bidirectional nonlinear characteristics of high damping rubber bearing（HDR）,and strong earthquake wave are selected and adjusted amplitude,then three directional seismic wave inputs were carried out on the curved girder bridges with and without HDR support.The seismic response results are compared.The results show that HDR can increase the natural period of the structure and reduce the seismic response of the curved girder bridge effectively.