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K. Koro¹ and H. Kanai²

¹Department of Civil Engineering, Niigata University, Japan
²Master's Program, Graduate School of Integrated Arts and Sciences, Niigata University, Japan

doi:10.4203/ccc.15.12.5

K. Koro, H. Kanai, "Three-Dimensional Finite Element Analysis of Cyclic Deformation of Ballast Beds at Rail Joints Using Grid-Type Sleepers", in J. Pombo, (Editor), "Proceedings of the Seventh International Conference on Railway Technology: Research, Development and Maintenance ", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 15, Paper 12.5, 2026, doi:10.4203/ccc.15.12.5

Keywords: ballast settlement, rail joint, track vibration, 3D elastoplastic FEM, grid-type sleeper, geometric dimension.

Abstract

This study investigates the influence of the geometric dimensions and material parameters of grid-type sleepers on the cyclic deformation of ballast beds in jointed railway tracks. A sensitivity analysis is performed using a three-dimensional finite element (FE) method with an elastoplastic constitutive model based on the cyclic densification model. The results indicate that an imbalance in the maximum railpad force around the rail joint induces residual rigid-body rotation of the grid-type sleeper, which becomes more pronounced with decreasing longitudinal bending stiffness. In addition, reducing the sleeper density increases ballast settlement due to enhanced residual deformation in the low-cycle regime, although this effect diminishes with increasing number of loading cycles.

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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: 15 PROCEEDINGS OF THE SEVENTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 12.5 Three-Dimensional Finite Element Analysis of Cyclic Deformation of Ballast Beds at Rail Joints Using Grid-Type Sleepers K. Koro¹ and H. Kanai² ¹Department of Civil Engineering, Niigata University, Japan ²Master's Program, Graduate School of Integrated Arts and Sciences, Niigata University, Japan doi:10.4203/ccc.15.12.5 Full Bibliographic Reference for this paper K. Koro, H. Kanai, "Three-Dimensional Finite Element Analysis of Cyclic Deformation of Ballast Beds at Rail Joints Using Grid-Type Sleepers", in J. Pombo, (Editor), "Proceedings of the Seventh International Conference on Railway Technology: Research, Development and Maintenance ", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 15, Paper 12.5, 2026, doi:10.4203/ccc.15.12.5 Keywords: ballast settlement, rail joint, track vibration, 3D elastoplastic FEM, grid-type sleeper, geometric dimension. Abstract This study investigates the influence of the geometric dimensions and material parameters of grid-type sleepers on the cyclic deformation of ballast beds in jointed railway tracks. A sensitivity analysis is performed using a three-dimensional finite element (FE) method with an elastoplastic constitutive model based on the cyclic densification model. The results indicate that an imbalance in the maximum railpad force around the rail joint induces residual rigid-body rotation of the grid-type sleeper, which becomes more pronounced with decreasing longitudinal bending stiffness. In addition, reducing the sleeper density increases ballast settlement due to enhanced residual deformation in the low-cycle regime, although this effect diminishes with increasing number of loading cycles. download the full-text of this paper (PDF, 2125 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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