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K. Nasrollahi, J. Nielsen, "Influence of Sleeper Base Area and Spacing on Long-Term Differential Settlement in a Railway Track Transition Zone", 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 17.2, 2024, doi:10.4203/ccc.7.17.2

Keywords: transition zone design, differential settlement, voided sleepers, dynamic vehicle–track interaction, short-term performance, long-term performance.

Abstract

A model for simulation of track geometry degradation is demonstrated by predicting and comparing the long-term performance of three transition zone designs in terms of differential settlement and voided sleepers. It includes a calibrated two-dimensional (2D) finite element model of a transition zone between a ballasted track on an embankment and a slab track on a rigid foundation. The influence of using shorter sleeper spacing or a broader sleeper base design to reduce the track stiffness gradient between the two track forms and improve the dynamic vehicle–track interaction is evaluated. The 2D track model includes a state-dependent seven-parameter model of the ballast and subgrade, accounting for potential loss of contact between sleepers and ballast and the interaction between sleepers via the ground, while the vehicle model represents a heavy haul wagon with axle loads 30 tonnes and speed 60 km/h.

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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 17.2 Influence of Sleeper Base Area and Spacing on Long-Term Differential Settlement in a Railway Track Transition Zone K. Nasrollahi and J. Nielsen Department of Mechanics and Maritime Sciences, Chalmers University of Technology, Gothenburg, Sweden doi:10.4203/ccc.7.17.2 Full Bibliographic Reference for this paper K. Nasrollahi, J. Nielsen, "Influence of Sleeper Base Area and Spacing on Long-Term Differential Settlement in a Railway Track Transition Zone", 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 17.2, 2024, doi:10.4203/ccc.7.17.2 Keywords: transition zone design, differential settlement, voided sleepers, dynamic vehicle–track interaction, short-term performance, long-term performance. Abstract A model for simulation of track geometry degradation is demonstrated by predicting and comparing the long-term performance of three transition zone designs in terms of differential settlement and voided sleepers. It includes a calibrated two-dimensional (2D) finite element model of a transition zone between a ballasted track on an embankment and a slab track on a rigid foundation. The influence of using shorter sleeper spacing or a broader sleeper base design to reduce the track stiffness gradient between the two track forms and improve the dynamic vehicle–track interaction is evaluated. The 2D track model includes a state-dependent seven-parameter model of the ballast and subgrade, accounting for potential loss of contact between sleepers and ballast and the interaction between sleepers via the ground, while the vehicle model represents a heavy haul wagon with axle loads 30 tonnes and speed 60 km/h. download the full-text of this paper (PDF, 11 pages, 919 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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