高桩承台连续刚构桥最大悬臂施工阶段风荷载分析

Wind Load Analysis of the Maximum Cantilever in Construction Periods of High-Rise Cap Continous Rigid Frame Bridge

以某高桩跨海大桥为背景,介绍了风荷载的计算方法,并对最大双悬臂状态的风载内力、静风稳定性及颤振稳定性进行了验算。验算结果表明:风荷载的大小及作用方式对主梁、主墩及桩基强度和位移影响比较大;风荷载的加载方式对桥梁的稳定性影响较小,对结构稳定性起主要作用的是恒载、施工荷载。

With a high rise pile sea-cross bridge as an example, the paper introduces the methods of calculating wind load and checks the aerostatic wind stability, internal forces of the wind load and the flutter in the maximum double cantilever stage. The calculation indicates that the strength and function mode have more influence on the main girder, main frusta, pile strength and placement; wind loading mode has less influence on the stability of the bridge; the main factors that control the structure stability are constant load and construction load.