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Appl. Sci. 2018, 8(5), 775; https://doi.org/10.3390/app8050775

Longitudinal Seismic Response of Continuously Welded Track on Railway Arch Bridges

1,2
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1,2
,
3
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1,2,* and 1,2,*
1
Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
2
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
3
Chuannan Inter-City Railway Co., Ltd., Zigong Sichuan 643000, China
*
Authors to whom correspondence should be addressed.
Received: 1 April 2018 / Revised: 8 May 2018 / Accepted: 9 May 2018 / Published: 13 May 2018
(This article belongs to the Section Mechanical Engineering)
View Full-Text   |   Download PDF [5984 KB, uploaded 13 May 2018]   |  

Abstract

The seismic response of continuously welded track on bridges is seeing increased interest. Taking the railway deck arch bridge as an example, a track–bridge spatial coupling finite element model was established, and the effects of arch rib temperature difference and bridge span layout on rail seismic force were analyzed. The results show that the peak rail seismic force is larger than the maximum expansion force, and thus track constraints should be taken into consideration in railway arch bridge seismic design. The area enclosed by the hysteresis curve of track resistance increases gradually with an increase in dynamic displacement, and under seismic loading the track constraints can be considered to be in a relatively stable state of energy dissipation. The rail seismic forces under different waves varied greatly, so a wave whose spectrum characteristics fit the bridge site well should be used. The beam temperature difference can affect the structural seismic response, but this effect can be ignored when only considering the maximum rail seismic force. With the application of a series of three continuous beams on the arch and the reasonable arrangement of fixed bearings and speed locks, the track longitudinal stress deformation during an earthquake outperforms that of supported beams. View Full-Text
Keywords: railway arch bridge; track–bridge interaction; continuous welded track; longitudinal seismic response railway arch bridge; track–bridge interaction; continuous welded track; longitudinal seismic response
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Liu, H.; Wang, P.; Wei, X.; Xiao, J.; Chen, R. Longitudinal Seismic Response of Continuously Welded Track on Railway Arch Bridges. Appl. Sci. 2018, 8, 775.

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