大跨度混凝土斜拉桥模态与地震响应分析

文章以某大跨度混凝土斜拉桥为工程背景,采用Midas Civil程序建立了空间分析模型,并采用子空间迭代法对大桥进行模态分析,总结出了该斜拉桥的动力特性。同时通过实际地震波输入,对该结构在地震激励下的时程响应进行了计算分析,探讨了大跨度混凝土斜拉桥的地震反应特点,为大跨度混凝土斜拉桥的设计提供参考。

Modal and Seismic Response Analysis of Large-span Concrete Cable-stayed Bridge

With a large-span concrete cable-stayed bridge as the engineering background,t he article used Midas Civil program to establish the spatial analysis model, used the subspace iteration method to conduct the modal analysis on the Bridge, and summed up the dynamic characteristics of this cable-stayed bridge.At the same time, through actual seismic wave input, the article conducted the calculation and analysis on the time history response of its structure under the earthquake excitation, and investigated the seismic response characteristics of large-span concrete cable-stayed bridge, providing the reference for the design of large-span concrete cable-stayed bridge.