Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Steel and Composite Structures Volume 32, Number 4, August25 2019 , pages 467-478 DOI: https://doi.org/10.12989/scs.2019.32.4.467 |
|
|
|
Mapping vertical bridge deformations to track geometry for high-speed railway |
||
Hongye Gou, Zhiwen Ran, Longcheng Yang, Yi Bao and Qianhui Pu
|
||
| 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. | ||
| Key Words | ||
| analytical model; bridge vertical deformation; high-speed railway; mapping relationship; track deformation; track geometry | ||
| Address | ||
| (1) Hongye Gou, Zhiwen Ran, Longcheng Yang, Yi Bao, 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) Hongye Gou: Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA. | ||