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C. Shi^1,2, A. Andersson¹, L. Xu³ and J. Guo⁴

¹Department of Civil and Architectural Engineering, KTH Royal Institute of Technology, Stockholm, Sweden
²College Civil and Transportation Engineering, Shenzhen University, Shenzhen, China
³School of Civil Engineering, Central South University, Changsha, China
⁴Department of Engineering Mechanics, KTH Royal Institute of Technology, Sweden

doi:10.4203/ccc.7.24.4

C. Shi, A. Andersson, L. Xu, J. Guo, "DEM Analysis of Lateral Sleeper Resistance: Effect of Sleeper-Ballast Interaction and Aggregate Friction", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 24.4, 2024, doi:10.4203/ccc.7.24.4

Keywords: railway ballasted track, lateral resistance, discrete element method, ballast bed, friction coefficient, sleeper-ballast interaction.

Abstract

This study utilizes a 3D DEM sleeper-ballast bed model, comprising four sleepers interacting with the actual shape of the ballast, to comprehensively explore the impact of sleeper-ballast interaction and ballast aggregate friction coefficient on the lateral resistance of ballast bed. Based on the DEM numerical simulation, the following conclusion can be drawn: 1) The friction resistance between the sleeper and the ballast is crucial in determining the lateral resistance in railway tracks, with the base ballast contributing to more than 50% of the lateral resistance of the ballast bed on average, 2) The sleeper bottom resistance and sleeper side resistance of lateral force is derived from the sleeper-ballast friction mechanisms, while the friction coefficient between the sleeper end and the shoulder ballast has minimal impact on the sleeper end resistance, 3) The lateral resistance of the ballast bed is more significantly influenced by alterations in the ballast friction coefficient than by changes in the friction coefficient sleeper-ballast interface.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 7 PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 24.4 DEM Analysis of Lateral Sleeper Resistance: Effect of Sleeper-Ballast Interaction and Aggregate Friction C. Shi^1,2, A. Andersson¹, L. Xu³ and J. Guo⁴ ¹Department of Civil and Architectural Engineering, KTH Royal Institute of Technology, Stockholm, Sweden ²College Civil and Transportation Engineering, Shenzhen University, Shenzhen, China ³School of Civil Engineering, Central South University, Changsha, China ⁴Department of Engineering Mechanics, KTH Royal Institute of Technology, Sweden doi:10.4203/ccc.7.24.4 Full Bibliographic Reference for this paper C. Shi, A. Andersson, L. Xu, J. Guo, "DEM Analysis of Lateral Sleeper Resistance: Effect of Sleeper-Ballast Interaction and Aggregate Friction", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 24.4, 2024, doi:10.4203/ccc.7.24.4 Keywords: railway ballasted track, lateral resistance, discrete element method, ballast bed, friction coefficient, sleeper-ballast interaction. Abstract This study utilizes a 3D DEM sleeper-ballast bed model, comprising four sleepers interacting with the actual shape of the ballast, to comprehensively explore the impact of sleeper-ballast interaction and ballast aggregate friction coefficient on the lateral resistance of ballast bed. Based on the DEM numerical simulation, the following conclusion can be drawn: 1) The friction resistance between the sleeper and the ballast is crucial in determining the lateral resistance in railway tracks, with the base ballast contributing to more than 50% of the lateral resistance of the ballast bed on average, 2) The sleeper bottom resistance and sleeper side resistance of lateral force is derived from the sleeper-ballast friction mechanisms, while the friction coefficient between the sleeper end and the shoulder ballast has minimal impact on the sleeper end resistance, 3) The lateral resistance of the ballast bed is more significantly influenced by alterations in the ballast friction coefficient than by changes in the friction coefficient sleeper-ballast interface. download the full-text of this paper (PDF, 14 pages, 740 Kb) go to the next paper return to the table of contents return to the volume description
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