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Structural Engineering and Mechanics Volume 71, Number 1, July10 2019 , pages 13-22 DOI: https://doi.org/10.12989/sem.2019.71.1.013 |
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Static and dynamic responses of a tied-arch railway bridge under train load |
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Hongye Gou, Biao Yang, Wei Guo and Yi Bao
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| 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. | ||
| Key Words | ||
| tied arch bridge; train load; dynamic response; field test; vertical movement; derailment coefficient | ||
| Address | ||
| Hongye Gou, Biao Yang: Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China Hongye Gou: Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China Wei Guo: School of Civil Engineering, Central South University, Changsha 410075, China; National Engineering Laboratory for High Speed Railway Construction, Changsha 410075, China Yi Bao: Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, NJ 07030 Hoboken, USA | ||