三塔悬索桥施工过程静风稳定性分析

摘要

By taking a three-tower suspension bridge--Taizhou Highway Bridge over Yangtze River with main span of 1 080 m as example, by using 3D structural nonlinear aerostatic analysis, the influence of deck erection sequence on the aerostatic stability during the whole construction process is revealed, and the favorable deck erection sequence is also proposed with respect to the aerostatic stability.The resuhs show that good aerostatic stability can be obtained for threetower suspension bridges as the deck erection starts simultaneously from the pylons to the midpoints of main spans.%以在建主跨为1080m的三塔双跨悬索桥——泰州长江公路大桥为工程背景，采用三维非线性空气静力稳定性分析方法，分析不同的主梁架设顺序对三塔悬索桥施工阶段空气静力稳定性的影响，确定具有良好抗风稳定件的施工方案。结果表明：三塔悬索桥主梁拼装采用从桥塔处至跨中施工时，可以获得较好的空气静力稳定性。