Effect of track defects on track deformations for high-speed railway bridge

Hongye Gou , Rui Xie , Chang Liu , Wei Guo , Bing Han , Yi Bao

Abstract

Track defects can change the interaction between layers and affect the nonlinear contact between the beam and base slab, causing deformations in the rail. This study proposes a theoretical model to clarify the influence mechanism of track defects on the track irregularity of high-speed railway bridges under pier settlement. The investigated track defects include the void under slab, interlayer debonding, and fastener fracture. The elongation coefficient of track deformation is used to describe the mapping characteristics of the interlayer parameters to track geometric under the additional bridge deformation. The geometric characteristics and changing trend of the rail surface are quantified under the influence of the failure position and critical length. Finally, the fundamental mechanisms of track deformation are elucidated, which lays a theoretical basis for further study of the long-term evolution of infrastructure.

Key Words

interface damage; long-term evolution; mapping characteristics; track deformation; track irregula

Address

Hongye Gou — Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
Rui Xie and Chang Liu — Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
Wei Guo — School of Civil Engineering, Central South University, Changsha 410075, P.R. China; National Engineering Laboratory for High Speed Railway Construction, Central South University, Changsha 410075, P.R. China
Bing Han — Southern Sichuan Intercity Railway CO., LTD, Chengdu, Sichuan 610031, China
Yi Bao — Department of Civil, Environmental & Ocean Engineering, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, NJ 07030, USA

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