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该大桥全长9.1km,全桥于1997年建成通车,营运至今近8年。随着交通量与重载交通量的增加,该桥在使用中存在行车不顺、盖梁开裂等病害。为了确保通行车辆的安全和行车的舒适性,对该桥进行了车桥耦合振动分析。本文采用数值模拟和有限元相结合的方法分别计算了不同车速下的桥梁响应,并初步探讨了路面不平顺对车桥耦合振动的影响。
The bridge, with a total length of 9.1km, was opened to traffic in 1997 and has been operating for nearly eight years. With the increase of traffic volume and heavy traffic volume, the bridge has some problems such as bad running, cracked cover beam and so on. In order to ensure the safety of passing vehicles and driving comfort, the bridge was analyzed for the coupled vibration of the axle. In this paper, the bridge response under different vehicle speeds is calculated by the combination of numerical simulation and finite element method, and the influence of road surface irregularity on the coupling vibration of the axle is also discussed.