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Static and dynamic responses of a tied-arch railway bridge under train load

  • Gou, Hongye (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Yang, Biao (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Guo, Wei (School of Civil Engineering, Central South University) ;
  • Bao, Yi (Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology)
  • Received : 2018.11.05
  • Accepted : 2019.03.20
  • Published : 2019.07.10

Abstract

In this paper, the static and dynamic responses of a tied-arch railway bridge under train load were studied through field tests. The deflection and stresses of the bridge were measured in different static loading scenarios. The dynamic load test of the bridge was carried out under the excitation of running train at different speeds. The dynamic properties of the bridge were investigated in terms of the free vibration characteristics, dynamic coefficients, accelerations, displacements and derailment coefficients. The results indicate that the tie of the measuring point has a significant effect on the vertical movement of the test section. The dynamic responses of arch bridge are insensitive to the number of trains. The derailment coefficients of locomotive and carriage increase with the train speed and symmetrically distributed double-line loads reduce the train derailment probability.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Ministry of Science and Technology of China

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