三峡工程中一座斜拉桥的侧向稳定性分析

我国三峡工程拟建设一座承载混凝土传送带的狭长单塔斜拉桥．梁的跨宽比为40，远大于一般情况．其侧向稳定性，特别是在架设过程中的侧向稳定性，引起各方面的关切．为此，作此理论分析结果表明，在本桥和一般斜拉桥中，梁无侧向弯曲失稳之虞．

Analysis of the Lateral Stability of a Cable-stayed Bridge in the Three Gorges Project

In the Three Gorges project it was proposed that a cable - stayed bridge should be built for supporting transport bands for concrete. The main span of the bridge has a steel truss girder 400m in length and 10m in breadth,and is supported by one tower ouly. From the unusual ratio of the length to the breadth l: b = 40 arose the doubt about the lateral stability of the girder, especially during the erection. This paper presents an approximate analsis of this problem. The result show that there is no problem about the lateral stability of the bridge in concern and of cablestayed bridges in general.