Structural Engineering and Mechanics

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Vibration analysis of train-bridge system with a damaged pier by flotilla collision and running safety of high-speed train

  • Xia, Chaoyi (School of Civil Engineering, Beijing Jiaotong University) ;
  • Wang, Kunpeng (CCCC Highway Bridges National Engineering Research Center Co., Ltd.) ;
  • Huang, Jiacheng (School of Civil Engineering, Beijing Jiaotong University) ;
  • Xia, He (School of Civil Engineering, Beijing Jiaotong University) ;
  • Qi, Lin (Tess, RTRI) ;
  • Wu, Xuan (School of Civil Engineering, Beijing Jiaotong University)
  • Received : 2020.08.05
  • Accepted : 2021.10.28
  • Published : 2022.01.10
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Abstract

The dynamic responses of a pier-pile-soil system subjected to a barge/flotilla collision are analyzed. A coupled high-speed train and bridge system with a damaged pier after barge/flotilla collision is established by taking the additional unevenness of the track induced by the damaged pier as the self-excitation of the system. The whole process of a CRH2 high-speed train running on the 6×32 m simply-supported PC (prestressed concrete) box-girder bridge with a damaged pier is simulated as a case study. The results show that the lateral displacements and accelerations of the bridge with a damaged pier are much greater than the ones before the collision. The running safety indices of the train increase with the train speed as well as with the number of barges in the flotilla. In flotilla collision, the lateral wheel/rail forces of the train exceed the allowable values at a certain speed, which influences the running safety of the trains.

Keywords

Acknowledgement

The research described in this paper was financially supported by the Fundamental Research Funds for the Central Universities (Grant No. 2020JBM042), and the Introducing Talents Base of Mitigating Wind-induced Disaster of Wind-sensitive Infrastructure (B13002).

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