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考虑车桥耦合振动计算了汽车通过曲线连续梁桥时车辆和桥梁的振动。把车辆和曲线连续梁桥视作两个分离子体系,分别应用广义虚功原理和有限元法推导了两者的各自振动方程组,通过位移协调方程及车桥相互作用联系方程把车辆和曲线连续梁桥振动耦合起来,建立了车桥耦合振动方程,给出了采用有限元通用分析软件ANSYS实现公路曲线连续梁桥车桥耦合振动的计算方法。数值算例表明,该计算方法仅经3次迭代即可获得较高精度及可靠的数值结果,并与连续梁按规范给定的基频估算值计算的冲击系数进行对比,在平整桥面情况下,两者基本吻合,在桥面不平度等级为C级时,两者相差较大,这说明按现有规范计算曲线连续梁桥的冲击系数,在某些特定的条件下,有可能是不安全的。从而为公路曲线连续梁桥动力性能评价寻求了一种方便可靠的数值分析方法。
Vibration of Vehicles and Bridges with Curved Continuous Girder Bridge Calculated Vibration of Vehicle and Bridge Considering Axle Coupling Vibration. The vehicle and curvilinear continuous beam bridge are regarded as two separate sub-systems. The generalized virtual work principle and finite element method are respectively used to derive the respective vibration equations of the two. Based on the displacement coordination equation and the equation of the interaction of the axle and the vehicle, Coupled vibration of continuous girder bridge, the coupling vibration equation of the axle is established, and the method to calculate the coupling vibration of the highway bridge continuous girder bridge with ANSYS software is given. Numerical examples show that this method can obtain high precision and reliable numerical results with only three iterations, and compared with the impact coefficients of continuous beams calculated according to the given fundamental frequency estimates of continuous beams. , The two basically coincide with each other. When the deck roughness is C grade, the difference between them is large, which shows that according to the existing code, the impact coefficient of the continuous curved bridge with curve can be calculated. Under certain conditions, it may be unsafe. Therefore, a convenient and reliable numerical analysis method is proposed to evaluate the dynamic performance of the continuous curved bridge with highway curves.