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International Journal of Steel Structures

, Volume 18, Issue 5, pp 1617–1630 | Cite as

The Evaluation of Axial Stress in Continuous Welded Rails via Three-Dimensional Bridge–Track Interaction

  • Anaphat Manovachirasan
  • Songsak Suthasupradit
  • Jun-Hyeok Choi
  • Bum-Joon Kim
  • Ki-Du Kim
Article
  • 31 Downloads

Abstract

The crucial differences between conventional rail with split-type connectors and continuous welded rails are axial stress in the longitudinal direction and stability, as well as other issues generated under the influence of loading effects. Longitudinal stresses generated in continuously welded rails on railway bridges are strongly influenced by the nonlinear behavior of the supporting system comprising sleepers and ballasts. Thus, the track structure interaction cannot be neglected. The rail-support system mentioned above has properties of non-uniform material distribution and uncertainty of construction quality. The linear elastic hypothesis therefore cannot correctly evaluate the stress distribution within the rails. The aim of this study is to apply the nonlinear finite element method using the nonlinear coupling interface between the track and structural model and to illustrate the welded rail behavior under the loading effect and uncertain factors of the ballast. Numerical results of nonlinear finite analysis with a three-dimensional solid and frame element model are presented for a typical track–bridge system. A composite plate girder, modeled by solid and shell elements, is also analyzed to consider the behavior of the welded rail. The analysis result showed buckling under the independent calculations of load cases, including ‘temperature change’, ‘bending of the supporting structure’, and ‘braking’ of the railway vehicle. A parametric study of the load combination method and the loading sequence is also included in this analysis.

Keywords

Continuous welded rail (CWR) 3D-track bridge interaction Non-linear coupling interface Nonlinear analysis Composite steel girder bridge 

Notes

Acknowledgements

This work was supported by Konkuk University, Seoul, Korea.

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Copyright information

© Korean Society of Steel Construction 2018

Authors and Affiliations

  1. 1.Department of Civil and Environmental System EngineeringKonkuk UniversitySeoulSouth Korea
  2. 2.Faculty of Engineering, Excellence Center for Road and Railway InnovationNaresuan UniversityPhitsanulokThailand
  3. 3.Department of Civil EngineeringBucheon UniversityBucheonSouth Korea

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