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Open AccessArticle

Experimental Study on Dynamic Effects of a Long-span Railway Continuous Beam Bridge

by Hongye Gou 1,2, Wen Zhou 1, Yi Bao 3, Xiaobin Li 1,* and Qianhui Pu 1
1
Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
2
Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Chengdu 610031, China
3
Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO 65401, USA
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(5), 669; https://doi.org/10.3390/app8050669
Received: 7 March 2018 / Revised: 4 April 2018 / Accepted: 14 April 2018 / Published: 26 April 2018
Studies on impact effects of trains on the railway bridge are important for ensuring the reliability of bridge and the safety of train operation. This paper presents an experimental study on the dynamic effects of moving trains on a long-span railway continuous beam bridge. The dynamic responses of the bridge under the moving trains were measured through in-situ testing and finite element analysis. The influences of the moving trains and track irregularity are considered. The investigated influencing factors include the weight and speed of the train and the irregularity of the track on the bridge. The results indicate that the train’s speed does not have obvious influence on the impact factor, while train’s weight and track irregularity have notable effects on the impact factor. But from the overall development law, with the increase of train speed, the impact factor increases. The impact factors obtained in this study are larger than the values provided by the China bridge design codes, which indicates that the bridge code underestimates the impact effect of the train on the bridge. The design value of the impact factor should be properly improved in the bridge design. View Full-Text
Keywords: railway; continuous beam bridge; dynamic test; impact factor; finite element analysis railway; continuous beam bridge; dynamic test; impact factor; finite element analysis
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Gou, H.; Zhou, W.; Bao, Y.; Li, X.; Pu, Q. Experimental Study on Dynamic Effects of a Long-span Railway Continuous Beam Bridge. Appl. Sci. 2018, 8, 669.

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