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车辆在小半径高墩曲线箱梁桥上运行时,因为离心力效应,会对桥面结构产生一个径向力。利用有限元软件建立了高墩曲线箱梁及汽车模型,模拟车辆在桥面上的曲线行驶过程,分析车辆运行过程中桥墩顶的径向位移规律。比较了刚度分配法计算的桥墩顶位移与有限元计算得到的位移时程曲线峰值。结果表明刚度分配径向力能够满足计算要求。
When a vehicle runs on a curved box girder bridge with a small radius and a high pier, it will generate a radial force on the bridge deck structure due to the centrifugal force effect. The finite element software was used to build the high-rise curve box girder and the automobile model. The curve course of the vehicle on the bridge deck was simulated. The radial displacement of the bridge pier top during the operation of the vehicle was analyzed. The peak value of the displacement time history curve calculated by the stiffness distribution method and the finite element method is compared. The results show that the stiffness distribution radial force can meet the calculation requirements.