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http://dx.doi.org/10.12989/scs.2019.32.4.467

Mapping vertical bridge deformations to track geometry for high-speed railway  

Gou, Hongye (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University)
Ran, Zhiwen (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University)
Yang, Longcheng (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University)
Bao, Yi (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University)
Pu, Qianhui (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University)
Publication Information
Steel and Composite Structures / v.32, no.4, 2019 , pp. 467-478 More about this Journal
Abstract
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.
Keywords
analytical model; bridge vertical deformation; high-speed railway; mapping relationship; track deformation; track geometry;
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Times Cited By KSCI : 5  (Citation Analysis)
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