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Train-induced dynamic behavior analysis of longitudinal girder in cable-stayed bridge

  • Yang, Dong-Hui (School of Civil Engineering, Dalian University of Technology) ;
  • Yi, Ting-Hua (School of Civil Engineering, Shenyang Jianzhu University) ;
  • Li, Hong-Nan (School of Civil Engineering, Dalian University of Technology) ;
  • Liu, Hua (China Railway Major Bridge (Nanjing) Bridge and Tunnel Inspect & Retrofit Co., Ltd.) ;
  • Liu, Tiejun (School of Civil and Environmental Engineering, Harbin Institute of Technology)
  • Received : 2017.12.03
  • Accepted : 2018.03.28
  • Published : 2018.05.25
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Abstract

The dynamic behaviors of the bridge structures have great effects on the comfortability and safety of running high-speed trains, which can also reflect the structural degradation. This paper aims to reveal the characteristics of the dynamic behaviors induced by train loadings for a combined highway and railway bridge. Monitoring-based analysis of the acceleration and dynamic displacement of the bridge girder is carried out. The effects of train loadings on the vertical acceleration of the bridge girder are analyzed; the spatial variability of the train-induced lateral girder displacement is studied; and statistical analysis has been performed for the daily extreme values of the train-induced girder deflections. It is revealed that there are great time and spatial variabilities for the acceleration induced by train loadings for the combined highway and railway cable-stayed bridge. The daily extreme values of the train-induced girder deflections can be well fitted by the general extreme value distribution.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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