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大跨径斜拉桥非线性静风稳定性全过程分析
程进, 肖汝诚, 项海帆
(同济大学桥梁工程系,上海200092)
摘 要:在综合考虑静风荷载与结构非线性影响的基础上,采用 增量与内外两重迭代相结合的方法对大跨径斜拉桥静风稳定性进行了全过程分析。以一座主
跨1 000 m的斜拉桥为例,验证了该方法的可行性。最后,探讨了初始攻角、斜拉索的垂度 效应等因素对大跨径斜拉桥静风稳定性的影响。
关 键 词:斜拉桥;空气静力稳定;非线性全过程分析
中图分类号:U448.27
文献标识码:A
Full range
nonlinear aerostatics analysis for longspan cable stayed
bridge
CHENG Jin,XIAO Rucheng,XIANG
Haifan
(Department of Bridge Engineering, Tongji University,
Shanghai 200092 , China)
Abstract: A new method which is
used to solve windinduced lateral torsio nal buckling
problem for longspan cablestayed bridges is proposed.Nonlinear
influences caused by structure and aerostatic load are
included in this method.N umerical results are presented
to demonstrate the accuracy and effectiveness of this
new method.Finally,the effects of the angle of incidence
and cable sag on a erostatic stability of longspan cablestayed
bridge are discussed.
Key words: cablestayed bridge;aerostatics stability;full
range n onlinear analysis
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