公路桥梁车桥耦合振动的模型试验研究  

Model Test Study on Vehicle-Bridge Coupling Vibration of Highway Bridge

作　　者：陈代海[1] 李银鑫 李整[1] 马来景 许世展 CHEN Daihai;LI Yinxin;LI Zheng;MA Laijing;XU Shizhan(School of Civil Engineering,Zhengzhou University Zhengzhou,450001,China)

机构地区：[1]郑州大学土木工程学院,郑州450001

出　　处：《振动．测试与诊断》2022年第2期256-262,405,共8页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(51408557);中国博士后科学基金资助项目(2013M541995);河南省交通运输科技计划资助项目(2020J-2-6)。

摘　　要：基于公路桥梁车桥耦合振动理论,通过精细测量车桥模型参数,建立了车桥梁试验模型和有限元模型,设计了一套公路桥梁车桥耦合振动试验系统。开展车桥耦合振动试验影响因素分析,探讨了行车道位置、车桥质量比、桥梁支座形式等试验因素的影响规律。结果表明:车桥模型自振频率的试验值与理论值基本吻合,验证了模型的适用性;不同车道位置10 cm的侧移对车桥动力响应影响不大,试验过程中可根据实际需要选择行车道;车桥质量比是车桥动力响应的重要影响因素,试验中为获得较为明显的车桥振动响应,建议车桥质量比选择范围为0.10~0.16;支座1模型(一端垫块支座、另一端滚轴支座)下车桥竖向加速度响应较为明显,试验过程中桥梁支座可选择支座1模型。Based on the vehicle-bridge coupling vibration theory of highway bridges,through precise measurement of vehicle-bridge model parameters,vehicle-bridge test models and finite element models are established,and highway bridge vehicle-bridge coupling vibration test systems are designed.The analysis of the influencing factors of the vehicle-bridge coupling vibration test is carried out,including the discussion of the location of the traffic lane,the mass ratio of the vehicle-bridge,and the form of the bridge support,etc.The results show that the experimental value of the natural frequency of the vehicle-bridge model approximately agrees with the theoretical ones,which verifies the applicability of the model;The lateral displacement of 10 cm in the different lane positions has little effect on the dynamic response,and the lane can be selected according to the actual needs in the test;The vehicle-bridge mass ratio is an important factor in the vehicle-bridge dynamic response.In the test,the vehicle-bridge mass ratio can be selected within the range of 0.10 to 0.16 to obtain a more obvious vehiclebridge vibration response;The vertical acceleration response of the vehicle and the bridge is obvious under the support model 1(one end of pad bearing and the other of roller bearing),which can be recommended to select for the bridge support in the test.

关 键 词：公路桥梁 车桥耦合振动 模型试验 有限元分析 动力响应 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] U446.1[交通运输工程—道路与铁道工程]