| 大跨度三塔悬索桥非线性静风稳定分析 |
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| 作者单位： | 济南市市政工程设计研究院有限责任公司，同济大学土木工程防灾国家重点实验室，中交水运规划设计院有限公司 |
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| 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。
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| 关 键 词： | 三塔悬索桥 静风稳定 非线性 失稳形态 失稳机理 |
Nonlinear aerostatic stability analysis of a long-span suspension bridge with three towers |
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| Authors: | PENG Xiao-gang ZHANG Wen-ming WANG Tao |
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| Affiliation: | PENG Xiao-gang1,ZHANG Wen-ming2,WANG Tao3 |
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| Abstract: | 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. |
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| Keywords: | suspension bridge with three towers aerostatic stability nonlinearity instability configuration instability mechanism |
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