基于试验测试的公路车-桥竖向振动相互影响分析

耦合的处理是桥梁在汽车荷载作用下动反应计算的一个难点。为了便于工程应用,需要对耦合作用作简化处理。基于实测振动曲线,分析了移动车辆对桥面竖向振动的贡献,以及桥面振动对移动车辆和静止车辆竖向振动的贡献。分析发现:车辆振动对桥梁竖向振动影响显著,但车辆的移动大大弱化了桥梁振动对车辆振动的影响,桥梁振动对移动车辆竖向振动影响很小可忽略不计。实测分析结果为车-桥耦合作用的简化处理提供了途径和依据。

Mutual Influence of Vertical Vibration between the Vehicle and the Bridge Based on Test

Finding a suitable way to treat dynamic coupling between the bridge and the vehicle is the difficulty of bridges subjected to moving vehicle. In order to facilitate the engineering application, the coupling effect is required to be simplified. Based on the measure data of vertical vibration the influence of interaction between the vehicle and the bridge is analyzed. The results show that the vehicle vertical vibration has significant influence on the vertical vibration of the bridge and the influence of the bridge on the vertical vibration of the vehicle can be neglected. The analysis result in this paper can provide a way and basis for simplified treatment of the vehicle-bridge coupling.