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沧口航道桥主梁静风稳定性分析

, PP. 58-62

Keywords: 桥梁工程,斜拉桥,钢箱梁,动力特性,三分力系数,空气静力稳定性

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Abstract:

沧口航道桥(双塔双索面钢箱梁斜拉桥)是青岛海湾大桥的主通航孔桥,为确保其在建成运营后的抗风稳定性、安全性和适用性,对其主梁进行了静风稳定性分析;采用FLUID软件计算主梁静力三分力系数,对主梁节段模型进行静力三分力系数风洞试验(与计算数据相吻合),然后求解主梁静风扭转发散临界风速,采用ANSYS软件求解其动力特性和主梁的静风横向屈曲临界风速。结果表明主梁静风扭转发散、横向屈曲临界风速计算最小值分别为579m/s和745.6m/s,均远大于检验风速95.8m/s,因而沧口航道桥主梁的空气静力稳定性能够得到足够保证。

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