大跨度钢管混凝土拱桥空间地震响应分析

Analyses of Spatial Seismic Responses from a Long-span Concrete-filled Steel Tube Arch Bridge

建立了四川白日坝大桥的空间有限元模型,研究了该桥的自振特性并讨论了结构主要参数对其动力特性的影响,然后对该桥在一致激励、行波效应、多点激励下的结构响应进行了分析,并考虑了几何非线性对结构地震响应的影响.得出了一些有益于工程的结论.

Bairiba Bridge in Sichuan Province is a long-span concrete-filled steel tube arch bridge. A detailed study of the uniform motivation, traveling effect and multipoint motivation of this bridge enables thispaper to build up a 3D FEM model for analyzing its dynamic characteristics and computing its seismic responses. Some results are obtained from the analyses and computations. They provide a few useful conclusions for engineering practice.