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| Limit Value Research on the Single Angles of Rotation at Bridge End of Heavy Haul Railway Ballastless Track |
| XU Hao, LIN Hong-song, TIAN Chun-xiang, YAN Hua |
| (China Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan 610031, China) |
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Abstract Abstract：Research purposes： Bridge end rotation will produce additional uplift force or down force of fastener system on ballastless track, which will lead to failure of fastener system, so we must limit the angle of bridge end rotation. In order to study the limit angle of bridge end rotation, the finite element model for calculating force of the fastening system at bridge ends of heavy haul railway was established in this paper. The influence of the angles of rotation at bridge ends, fastening system space at the bridge crevice, pad stiffness and overhanging lengths of bridge ends on fastening system at bridge ends were analyzed. And the limit values of the single bridge end rotation under different pad stiffness and overhanging lengths of bridge ends are gained on the angle at which the uplift force does not exceed the uplift limits of the fastener. Research conclusions： (1) The influence of the fastener system space at bridge crevice on the force of fastener system is small, whereas the influence of the pad stiffness and overhanging lengths of bridge ends on the force of fastener system is large. (2) The bigger the pad stiffness and overhanging lengths of bridge ends are, the less limits angle of rotation at single bridge ends is. (3) The bridge clockwise rotation limit angle is less than counterclockwise rotation limit. (4) The limit angle of rotation at single bridge end should be fixed according to the design parameters of fastening system and then check the uplift force of fastening system could meet the uplift limit of fastener. (5) This paper could provide support for the design of heavy haul railway ballastless track.
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Received: 15 September 2017
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2017, Vol. 34 
