非一致地震激励下大跨斜拉桥的地震反应

为了研究非一致地震激励下大跨斜拉桥的地震响应规律,利用大型通用有限元分析软件ANSYS10.0建立该桥的动力计算模型,然后应用动力时程方法分析其地震反应,探讨波传播效应对非一致地震激励下大跨度双塔斜拉桥地震反应的影响规律.研究表明,对大跨度斜拉桥而言,一致地震激励不能控制其抗震设计,要对大跨度斜拉桥的地震反应进行准确分析,场地条件及行波效应必须予以考虑.

Seismic response of long-span cable stayed bridge under asynchronous excitations

Seismic response of long-span cable-stayed bridge had been studied by establishing a dynamic model of cable-stayed bridge through FEA software ANSYS10.0, and by analyzing the response with the dynamic time-history. In the seismic response analysis of the influences of wave-passage effect on long-span cable-stayed bridge with twin towers under non-uniform excitation are discussed. A conclusion is given that the uniform seismic excitation is not able to control the seismic design for the long-span cable-stayed bridge. In order to get accurate results, the influences of local site effect and wave-passage effect on seismic response should be considered.