- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | ZHANG Lu, LI Bing, WANG Shaohua, LI Huaixian. Numerical Simulation Method for Vertical Vibration of Heavy Vehicle-Expansion Joint Coupled System[J]. Journal of Southwest Jiaotong University, 2022, 57(5): 1032-1039. doi: 10.3969/j.issn.0258-2724.20200712
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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 center beams and the rear bridge deck increases with speed. The maximum impact factors are 0.67 and 0.82 respectively, both exceeding the recommended value of 0.45 in the current Chinese standard. It should be given more attention.
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