Numerical Simulation Method for Vertical Vibration of Heavy Vehicle-Expansion Joint Coupled System

被引：0
作者：
Zhang L. [1 ,2 ]
Li B. [3 ]
Wang S. [1 ,2 ]
Li H. [1 ,2 ]
机构：
[1] School of Mechanical Engineering, Southwest Jiaotong University, Chengdu
[2] Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu
[3] School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2022年 / 57卷 / 05期
关键词：
coupled vibration; expansion joints; experimental verification; numerical simulation; vehicles;
D O I：
10.3969/j.issn.0258-2724.20200712
中图分类号：
学科分类号：
摘要：
To study the influence of vehicles on vibration characteristics of large displacement expansion joints, a vertical dynamic model of heavy vehicle-expansion joint coupled system is established, considering the real load characteristics of a wheeled heavy vehicle when passing a large displacement bridge expansion joint. The new fast integration method is introduced to solve the numerical model. Taking ZL1600 modular large displacement expansion joint as the research object, the validity of the model is verified by comparing simulation results with test results. Based on the model, the impact effect of wheeled heavy vehicle on expansion joint is analyzed. The results show that the dynamic model simulation results of vertical velocity at the center beam test points can be well matched with the test results. The deviations of center beam maximum sinking displacements between simulation results and test results are less than 10.0%, which indicates that the model has high calculation accuracy. The maximum impact factor of tire loads occurs when the wheel drives on the bridge deck behind the expansion joint. Therefore, it is necessary to strengthen the nearby structure. The impact factor of tire loads on the centerbeamsandtherearbridgedeckincreaseswithspeed.Themaximumimpactfactorsare0.67and0.82respectively, both exceeding the recommended value of 0.45 in the current Chinese standard. It should be given more attention. © 2022 Science Press. All rights reserved.
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页码：1032 / 1039
页数：7
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