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现阶段国内高墩大跨连续刚构桥在运营阶段缺乏对车桥相互作用的研究,导致车辆通过桥梁时车内乘客的舒适性差,桥梁的“抖动”明显,影响行车舒适性、桥梁耐久性。本文通过建立在ANSYS环境下的车桥相互作用有限元分析方法,对工程实例进行建模分析,得到工程实例在车桥相互作用下的动扰度、动弯矩时程曲线,以及其对应冲击系数对比图。并提出加装液态黏滞阻尼器的改善措施,并通过动力测试法,对比了液态黏滞阻尼器加装前后动挠度、动弯矩的效应、验证了加装液态黏滞阻尼器对车桥相互作用的削弱作用。
At this stage, the research on long-span continuous rigid frame bridge with high pier and large span in China lacks the research on the interaction of axle and axle at the operation stage, which leads to the poor comfort of passengers in the vehicle when passing the bridge. The bridge’s “jitter” is obvious, Durability. In this paper, the finite element analysis method of the bridge interaction is established based on the ANSYS environment, and the engineering examples are modeled and analyzed. The dynamic disturbances and dynamic moment curves of the engineering examples under the interaction of the vehicle and the bridge are obtained, and the corresponding impact Coefficient comparison chart. The improvement measures of adding liquid viscous damper are put forward. By dynamic test method, the effect of dynamic deflection and dynamic bending moment before and after the installation of liquid viscous damper is compared. It is verified that the application of liquid viscous damper to the axle The weakening effect of interaction.