TY - JOUR
T1 - Mapping vertical bridge deformations to track geometry for high-speed railway
AU - Gou, Hongye
AU - Ran, Zhiwen
AU - Yang, Longcheng
AU - Bao, Yi
AU - Pu, Qianhui
N1 - Publisher Copyright:
Copyright © 2019 Techno-Press, Ltd.
PY - 2019/8/25
Y1 - 2019/8/25
N2 - Running safety and ride comfort of high speed railway largely depend on the track geometry that is dependent on the bridge deformation. This study presents a theoretical study on mapping the bridge vertical deformations to the change of track geometry. Analytical formulae are derived through the theoretical analysis to quantify the track geometry change, and validated against the finite element analysis and experimental data. Based on the theoretical formulae, parametric studies are conducted to evaluate the effects of key parameters on the track geometry of a high speed railway. The results show that the derived formulae provide reasonable prediction of the track geometry change under various bridge vertical deformations. The rail deflection increases with the magnitude of bridge pier settlement and vertical girder fault. Increasing the stiffness of the fasteners or mortar layer tends to cause a steep rail deformation curve, which is undesired for the running safety and ride comfort of high-speed railway.
AB - Running safety and ride comfort of high speed railway largely depend on the track geometry that is dependent on the bridge deformation. This study presents a theoretical study on mapping the bridge vertical deformations to the change of track geometry. Analytical formulae are derived through the theoretical analysis to quantify the track geometry change, and validated against the finite element analysis and experimental data. Based on the theoretical formulae, parametric studies are conducted to evaluate the effects of key parameters on the track geometry of a high speed railway. The results show that the derived formulae provide reasonable prediction of the track geometry change under various bridge vertical deformations. The rail deflection increases with the magnitude of bridge pier settlement and vertical girder fault. Increasing the stiffness of the fasteners or mortar layer tends to cause a steep rail deformation curve, which is undesired for the running safety and ride comfort of high-speed railway.
KW - Analytical model
KW - Bridge vertical deformation
KW - High-speed railway
KW - Mapping relationship
KW - Track deformation
KW - Track geometry
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U2 - 10.12989/scs.2019.32.4.467
DO - 10.12989/scs.2019.32.4.467
M3 - Article
AN - SCOPUS:85071661448
SN - 1229-9367
VL - 32
SP - 467
EP - 478
JO - Steel and Composite Structures
JF - Steel and Composite Structures
IS - 4
ER -