Techno Press

Steel and Composite Structures   Volume 29, Number 2, October25 2018, pages 219-229
Effect of bridge lateral deformation on track geometry of high-speed railway
Hongye Gou, Longcheng Yang, Dan Leng, Yi Bao and Qianhui Pu

Abstract     [Full Text]
    This paper presents an analytical model to analyze the mapping relationship between bridge lateral deformation and track geometry of high-speed railway. Based on the rail deformation mechanisms, the deformation of track slab and rail at the locations of fasteners are analyzed. Formulae of rail lateral deformation are derived and validated against a finite element model. Based on the analytical model, a rail deformation extension coefficient is presented, and effects of different lateral deformations on track geometry are evaluated. Parametric studies are conducted to evaluate the effects of the deformation amplitude, fastener stiffness and mortar layer stiffness on the rail deformation. The rail deformation increases with the deformation of the girder, and is dependent on the spacing of the fasteners, the elastic modulus of the rail's material, and the moment of inertia of the rail's section.
Key Words
    analytical model; bridge lateral deformation; high-speed railway; mapping relationship; track geometry
(1) Hongye Gou, Longcheng Yang, Dan Leng, Qianhui Pu:
Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;
(2) Hongye Gou:
Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China;
(3) Yi Bao:
Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI 48109, USA.

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