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ORIGINAL RESEARCH article

Front. Built Environ.
Sec. Geotechnical Engineering
Volume 10 - 2024 | doi: 10.3389/fbuil.2024.1498790

Dynamic response analysis of concrete filled steel tube tied-arch bridge under moving train load

Provisionally accepted
Yongnian Zou Yongnian Zou 1Zhidong Liu Zhidong Liu 2Changjin Tian Changjin Tian 3Xiaoning Zhang Xiaoning Zhang 4Bo Liu Bo Liu 5*
  • 1 China Railway 24th Bureau Group Nanchang Railway Engineering Co Ltd, nanchang, China
  • 2 Lunan High-Speed Railway Co Ltd, Jinan, China
  • 3 China Construction Foundation and Infrastructure Co Ltd, Jinan, Shandong Province, China
  • 4 Chongqing University, Chongqing, China
  • 5 Yantai University, Yantai, China

The final, formatted version of the article will be published soon.

    The analysis of bridge vibration response under train loads is crucial for the operational safety of railway bridge structures. In this study, a three-dimensional coupled dynamic model of train-track-truss arch bridge is established. Based on the numerical simulation results, the effects of different train axle loads and speeds on the vibration response of the truss arch bridge are analyzed, and the time-history changes of the displacement and stress at critical sections of the bridge are revealed. The results show that: During the train operation, the maximum vertical dynamic stress and maximum vertical displacement are linearly related to the train axle load and speed. The greater the train axle load and speed, the larger the maximum vertical dynamic stress and maximum vertical displacement. The maximum vertical acceleration generated during train operation increases linearly with train speed and exponentially with train axle load. The most unfavorable section occurs at the mid-span of the bridge, where the maximum vertical displacement, maximum vertical dynamic stress, and maximum vertical acceleration are all at their peak. This research has significant implications for engineering safety and operation.

    Keywords: High-speed railways, truss arch bridges, Train-bridge coupled vibration, numerical simulation, Vibration response analysis

    Received: 19 Sep 2024; Accepted: 31 Oct 2024.

    Copyright: © 2024 Zou, Liu, Tian, Zhang and Liu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Bo Liu, Yantai University, Yantai, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.