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斜拉索风雨振响应特性

, PP. 41-48

Keywords: 桥梁工程,斜拉索,现场观测,风雨振,响应特征

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Abstract:

?为了研究斜拉桥拉索风雨振的机理及响应特征,在岳阳洞庭湖大桥建立了由风速仪、雨量计、加速度传感器组成的风雨振现场观测系统,观测到了多次拉索风雨振现象;得到了发生拉索风雨振时风速、风向及雨量的基本条件,分析了风雨振时拉索振动的幅值、主振频率、模态参与特性及空气动力负阻尼比等响应特征。结果显示拉索风雨振很少为单模态振动,大多表现为主振模态和多阶模态参与的振动。

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