Abstract: In this paper, the travelling-wave effect on planar seismic responses of the long-span arch bridges is analysed based on the theory of multiple-support seismic excitations and the conception of pseudo-static displacement. The step-by-step integration method is applied considering the geomet rical nonlinearities and the p-Δeffect caused by the dead-load. The numerical result shows that the travelling-wave effect has serious influence on the long-span arch bridge and should be considered in engineering design.

Key words: long-span arch bridge, travelling-wave effect

摘要： 基于多点激振理论和拟静力位移概念分析大跨度拱桥纵平面的行波效应, 考虑恒载起点的p-Δ 效应及几何非线性的影响.采用逐步积分法, 算例表明, 地震行波作用对大跨度拱桥影响很大,工程设计应予以重视.

关键词: 大跨度拱桥, 行波效应