Study On Fastenimg Force Of Ballastless Track Nearby Bridge Beam End

As laying ballastless track on bridge, the distortion of bridge would have a significant influence on ballastless track structure. When beam-end distortion of bridge arises, partial uplifts of beam-end rail, that produces additional uplift forces or down forces within a certain scope of both sides of the beam joints, can be caused. Starting from the beam-end displacement influence on ballastless track, this paper mainly analyzes stressing influences on fastener system of ballastless track by beam-end rotation angle, staggered platform and train load, and also proposes the corresponding structure improving measures.Firstly, based on the characteristics of beam-end displacement, the paper establishes calculating modal of beam-end displacement influence on fastener system stressing of ballastless track, uses finite element method to discrete modal and performs calculation and analysis by using ANSYS software.Secondly, according to different beam-end rotation angles, staggered platforms, train loads, fastener design parameters and beam-end bracket lengths, the paper performs calculation and analysis of beam-end fastener system stressing and displacement characteristics of ballastless track. The result shows that beam-end rotation angle, staggered platform and stiffness of fastener have an obvious influence on the stressing of fastener system.Finally, to reduce beam-end displacement influence on fastener system'sstressing of ballastless track, the paper proposes the structural measure of introducing transition track to beam-end of bridge. By establishing contrast modal of fastener system, the paper calculates the stress of fastener system at different conditions which is with or without transition track. The result shows that the stress of fastener system can be effectively reduced by setting transition track at beam-end...