某双塔斜拉桥抗震性能研究

Study on seismic performance for a cable-stayed bridge

以某大跨双塔斜拉桥为例,建立了主桥和引桥一体的动力模型,通过反应谱和非线性时程方法,分析了其地震响应,研究表明该桥满足抗震性能目标,纵向设置粘滞阻尼器后能显著的减少纵向地震反应内力。

In the paper, a long-span cable-stayed bridge is taken as an example. The dynamic model of cable-stayed bridge included main bridge and approach bridges. Using response spectrum and time history analysis method to analysis the response under earthquake attacked. The study results indicate that the seismic performance of the cable-stayed bridge can meet the expected goal. The seismic response in longitudinal direction decreased obviously when allocated viscous dampers.