TY - JOUR
T1 - Effect of track defects on track deformations for high-speed railway bridge
AU - Gou, Hongye
AU - Xie, Rui
AU - Liu, Chang
AU - Guo, Wei
AU - Han, Bing
AU - Bao, Yi
N1 - Publisher Copyright:
© 2021 Techno Press. All rights reserved.
PY - 2021/11/10
Y1 - 2021/11/10
N2 - 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.
AB - 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.
KW - interface damage
KW - long-term evolution
KW - mapping characteristics
KW - track deformation
KW - track irregularity
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U2 - 10.12989/scs.2021.41.3.447
DO - 10.12989/scs.2021.41.3.447
M3 - Article
AN - SCOPUS:85129046531
SN - 1229-9367
VL - 41
SP - 447
EP - 459
JO - Steel and Composite Structures
JF - Steel and Composite Structures
IS - 3
ER -