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中文摘要：
综合考虑静风荷载非线性和几何非线性,引用大跨度桥梁非线性静风稳定分析理论,通过引入外层迭代次数上限对增量与内外两重迭代相结合的方法进行改进,提出了优化迭代分析方法,编制计算程序对世界最大跨径钢箱梁悬索桥西堠门大桥的静风稳定性进行全过程分析,研究了该桥的失稳形态和机理.通过计算与改进前的算法进行比较,优化迭代分析方法结果准确、效率高.
英文摘要：
Considering static wind load nonlinearity and geometric nonlinearity,the nonlinear aerostatic stability theory for long span bridges is applied in this paper.The upper limit of outer iteration number is set optimumly to improve the incremental double iteration method,and optimum iteration method is put forward.The corresponding program is developed and used to analyze the full range aerostatic instability of Xihoumen Bridge,which will be the longest suspension bridge with steel box girder in the world,and the configuration and mechanism of Xihoumen Bridge＇s aerostatic instability are accordingly discussed.Optimum iteration method is compared with the method without improvement in analysis,and the result indicates that the accuracy and efficiency of optimum iteration method are much better,so the validity and advancement of optimum iteration method are proved.
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