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Effect of lateral deformations of a simply-supported beam bridge on high-speed railway traffic safety under earthquake action

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Abstract

To study the influence of the lateral deformations of a simply-supported beam bridge on the safety of high-speed railway train operations under earthquake action, this study adopted a three-span simply-supported beam bridge with 32-m spans as an example. Finite element software ANSYS and multi-body dynamics software SIMPACK were used to establish a coupled train-bridge dynamic model subjected to seismic excitations. By adopting different ground motions and changing the peak ground acceleration (PGA) and the train speed, the effects of different earthquakes and train speeds on the train driving safety were analyzed. Several conclusions were obtained. First, the trends in train derailment coefficient, wheel load reduction rate, lateral horizontal wheelset forces, vertical accelerations of the car body, lateral accelerations of car body, and other dynamic indices were similar under different ground motions, but the actual values were different. Second, the PGA had a significant impact on the train derailment coefficient, wheel load reduction rate, lateral horizontal wheelset forces, and lateral accelerations of the car body, but little effect on the vertical accelerations of the car body. Third, the train speed affected the train derailment coefficient, wheel load reduction rate, lateral horizontal wheelset forces, vertical accelerations of the car body, and lateral accelerations of the car body, and these dynamic performance indices were positively correlated with the train speed. Fourth, in case of the earthquake with a PGA of 0.3 g, a high-speed train would have to travel slower than at 280 km/h to ensure the safety and comfort of the ride.

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Acknowledgements

The authors would also like to thank PhD Zhang Ziyang at Southwest Jiaotong University for his assistance with data analysis. We acknowledge and respect the contributions of other researchers, adhering to the principles of academic integrity when citing and quoting their work. We affirm that there is no potential conflict of interest or misconduct that could compromise the objective interpretation of the study results. In the event of any violation of scientific ethics or identification of data inaccuracies, we take full responsibility and commit to taking appropriate corrective actions.

Funding

The authors would like to acknowledge the National Key Research and Development Program of China (2016YFB1200401), the National Natural Science Foundation of China (52278220, 51878564), Sichuan Science and Technology Program (2021JDTD0012, 2020YFH066), Science and Technology program of returned personnel studying abroad in Sichuan ([2021]29).

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Authors and Affiliations

  1. Department of Bridge Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Wei Huang, Yuehan Sun, Binghui Li & Yulin Zhan

  2. Ziyang Housing and Urban-Rural Development Bureau, Chengdu, 610041, China

    Qiang Zhang

  3. School of Architecture and Civil Engineering, Chengdu University, Chengdu, 610106, China

    Junhu Shao

  4. Institute of Civil Engineering Materials, Southwest Jiaotong University, Chengdu, 610031, China

    Yulin Zhan

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  1. Wei Huang
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Correspondence to Yulin Zhan.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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This paper adheres to the principles of scientific ethics and ethical guidelines, and complies with relevant research ethics regulations. The data collection, analysis, and reporting processes in this study were conducted with proper permissions, ensuring privacy and confidentiality. We are dedicated to implementing appropriate measures to ensure the integrity, accuracy, and reliability of the data. The rights and well-being of the study participants were respected, and their informed consent was obtained.

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Huang, W., Sun, Y., Li, B. et al. Effect of lateral deformations of a simply-supported beam bridge on high-speed railway traffic safety under earthquake action. Nat Hazards (2024). https://doi.org/10.1007/s11069-024-06626-w

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