期刊
STRUCTURE AND INFRASTRUCTURE ENGINEERING
卷 15, 期 8, 页码 1015-1024出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/15732479.2019.1594314
关键词
Hybrid framed arch bridge; in-site dynamic test; dynamic response; finite element model; impact effect; riding comfort
资金
- National Natural Science Foundation of China [51878563]
- Sichuan Science and Technology Program [2018JY0294, 2018JY0549]
- Science and Technology Research and Development Plan of China Railway Construction [2014-C34]
In this study, the dynamic behavior of a concrete-filled steel tube (CFST) hybrid framed arch railway bridge under moving trains are investigated through an in-site dynamic test. The bridge was tested under train loadings in different scenarios and at different speeds of the trains. The free vibration characteristics, strain, displacement, and acceleration of the bridge structure were measured to evaluate the dynamic responses of the train-bridge coupling system. A three-dimensional finite element model, which took into account the train-bridge coupling and track irregularities, was established to analyze the behaviors of the train-bridge system. The model was validated against the in situ test results. The impact effect on the girder was greater than that of the arch frame. The acceleration responses of the trains on the bridge increased with the train's speed. The riding comfort of the trains was evaluated based on the measured dynamic responses of trains.
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