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大件运输中简支梁桥的动力响应分析及监测

DOI: 10.3969/j.issn.1006??7043.201301060

Keywords: 简支梁桥, 大件运输, 耦合振动, 参数反演, 实桥监测, 冲击系数, 动态响应

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Abstract:

为了研究大件过桥时车桥系统的耦合振动,以中石油吸收塔运输为背景,对于简支梁桥的动力响应进行了实时监测,采用广义虚功原理推导了车辆的振动方程组,利用位移协调方程把车桥振动耦合起来并利用ANSYS进行求解。结果表明:理论值和实测值吻合较好;大件运输低速过桥时,车桥耦合振动作用明显,冲击系数仍然较大;对于中小跨径桥梁,路面不平度对于冲击系数的影响较大,对桥面进行平整度处理是降低车辆冲击效应的有效方法

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