摘要
随着跨径的不断增大,缆索承重桥梁存在静风失稳的可能性。引用大跨度桥梁非线性空气静力稳定分析理论,采用荷载增量与内外两重迭代相结合的方法,在通用软件ANSYS中实现了对大跨度缆索承重桥梁进行非线性静风稳定分析功能。综合考虑几何非线性和静风荷载非线性,对某三塔双主跨悬索桥在不同风攻角下进行了非线性静风稳定全过程分析,分析了结构失稳形态,并探明了其失稳机理。
The probability of aerostatic instability is existed with the increasement of span of cable-supported bridges. Using the commercial software ANSYS, nonlinear aerostatic stability analysis was made for cable-supported bridge based on nonlinear aerostatic stability theory together with the incremental double iteration method. Considering nonlinearity of static wind load and geometric, the full range aerostatic instability of a long span suspension bridge with three towers and two main spans was analyzed, and the configuration and mechanism of this bridge＇s aerostatic instability were accordingly discussed.
出处
《山东建筑大学学报》
2008年第5期435-437,470,共4页
Journal of Shandong Jianzhu University
关键词
三塔悬索桥
静风稳定
非线性
失稳形态
失稳机理
suspension bridge with three towers
aerostatic stability
nonlinearity
instability configuration
instability mechanism
