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中文摘要：
应用非线性静风稳定分析理论,结合平均风分解法,提出了斜风作用下大跨度悬索桥非线性静风稳定分析方法.综合考虑静风荷载非线性和结构自身非线性,编制了相应的分析程序.以某三塔双主跨悬索桥为对象,进行了不同风偏角和不同风攻角下的非线性静风稳定全过程分析.结果表明：静风失稳最低临界风速发生在非0°初始偏角情形下,即斜风对大跨度悬索桥静风稳定性可能更不利;在斜风作用下,双主跨悬索桥的来流跨首先进入失稳状态.
英文摘要：
A method to analyze the nonlinear aerostatic stability of long-span bridges under yawed wind was put forward by using the nonlinear aerostatic stability theory and the method of mean wind decomposition. The corresponding code was developed considering static wind load nonlinearity and structural nonlinearity. Considering a suspension bridge with three towers and two main spans, the full range aerostatic instabilities were analyzed under wind in different attack angles and yawed angles. The result indicates that the lowest critical wind speed of aerostatic instability is gained when the initial yawed angle isn＇t 0°, which suggests yawed win is disadvantage to aerostatic stability of a long-span suspension bridge. The result also shows that the span in the upstream goes into instability first, and the reason of this phenomenon was analyzed.
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