大件运输中简支梁桥的动力响应分析及监测

发布时间：2018-01-05 02:07

本文关键词：大件运输中简支梁桥的动力响应分析及监测　出处：《哈尔滨工程大学学报》2014年03期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:In order to study the coupling vibration of the vehicle-bridge system when a large piece of bridge is crossing, the dynamic response of the simply supported beam bridge is monitored in real time with the transportation of the absorption tower of CNPC as the background. The vibration equations of the vehicle are derived by using the generalized virtual work principle. The vibration of the vehicle and bridge is coupled by the displacement coordination equation and solved by ANSYS. The results show that the theoretical value is in good agreement with the measured value. The coupling vibration of the vehicle and bridge is obvious and the impact coefficient is still large when the heavy load transports over the bridge at low speed. For medium and small span bridges, pavement roughness has a great impact on impact coefficient, and it is an effective method to reduce the impact effect of vehicles by dealing with the smoothness of bridge deck.
【作者单位】：山东大学土建与水利学院;长安大学公路学院;
【基金】：国家自然科学基金资助项目(50779032)
【分类号】：U441.3
【正文快照】： 中国加入WTO以来,公路大件运输日趋频繁,经由公路运输的重型工业设备(如发电机静子、变压器及反应器等)重量不断刷新记录。繁重的大件运输任务,对公路桥梁的承载能力和安全评估提出了挑战。目前针对超重大件过桥的研究多集中于桥梁的承载能力评估、临时加固措施方面[1-3],针对

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