大跨度斜拉桥地震反应时程分析

Seismic Response Time-History Analysis of Long-Span Cable-Stayed Bridge

大跨度斜拉桥一般都是交通运输的枢纽工程,对斜拉桥进行正确有效的抗震设计有着非常重要的意义。通过有限元建模对大跨度斜拉桥进行动力特性分析;运用时程分析方法,选取EI-Centro波对该桥进行了地震反应分析,分析了大跨度斜拉桥在不同地震动作用下的反应特点。分析结果表明,对于长柔性体系的斜拉桥,不能忽略竖向地震反应,应对竖向地震反应做必要的研究。

Large-span cable-stayed bridge is a transportation hub project, therefore, the seismic design of cable-stayed bridges are valid, has some very important implications. This article by finite element modeling for dynamic characteristic analysis of long-span cable-stayed bridges; using time history analysis method, select EI-Centro waves on the bridge for earthquake response analysis, analysis of long-span cable-stayed bridges under different seismic response characteristics. Analysis results show that long flexible systems for cable-stayed bridges, vertical seismic response must not be ignored, vertical seismic response of doing the necessary research.