大跨度结合梁斜拉桥抗风稳定分析

Analysis on Wind-resistant Stability of Long-span Combined Beam Cable-stayed Bridge

位于山区的大跨度斜拉桥,因峡谷风效应抗风稳定是桥梁分析的重点内容之一。以主跨360m的河口大桥为例,进行了该桥的动力特性分析及抗风稳定分析。分析结果表明,最大悬臂施工状态和成桥状态结构均满足抗风稳定要求,说明该结构体系抗风性能良好,其分析成果为同类大桥设计提供理论参考。

The long-span cable-stayed bridge located in the mountainous area is one of important contents in the bridge analysis because of the wind-resistant stability by the wind effect of canyong.Taking the main span 360 m of Bayou Bridge as an example,the article analyzes the dynamical characteristics and the wind-resistant stability of this bridge.The analysis result shows that the structures at the longest cantilever construction state and the bridge completion state can all satisfy the requirements of wind-resistant stability.The wind-resistant capability of this structural system is good.The analysis result can be referred for the design of the similar bridges.