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Analytical solution to mapping rail deformation under bridge transverse deformation using energy variational principle

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Journal of Central South University 2022年第8期29卷 2654-2664页

作者： LAI Zhi-peng JIANG Li-zhong ZHOU Wang-bao LIU Xiang YU Jian ZHANG Yun-tai School of Civil Engineering Central South UniversityChangsha 410075China School of Civil Engineering Fujian University of TechnologyFuzhou 350118China

The track geometry is a critical factor that affects the running safety and riding comfort of trains moving on a high-speed railway *** study addresses the mapping relationship between the track deformation and lateral deformations of *** equations and natural boundary conditions of the track-bridge system are established based on the energy variational principle,and an analytical solution is derived for the track deformation accounting for lateral bridge deformations.A five-span simply-supported bridge with continuous welded rail has been selected as the case *** mapping rail deformations are compared to the finite element results,and both results agree well with each other,validating the analytical method proposed in this *** influence factors on the mapping rail deformation are further *** show that the mapping rail deformation is consistent with the girder displacement at the area that is away from the girder ends when the flexural stiffness ratio between the track and the bridge girder is *** interlayer stiffness has a significant effect on the mapping rail deformation when the track flexural stiffness is of a high value.

关键词： energy variational principle simply-supported beam bridge high-speed railway continuous welded rail mapping rail deformation

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