Print Email Facebook Twitter Discrete element modelling of rubber-protected ballast performance subjected to direct shear test and cyclic loading Title Discrete element modelling of rubber-protected ballast performance subjected to direct shear test and cyclic loading Author Guo, Y. (TU Delft Railway Engineering) Ji, Yameng (Beijing Jiaotong University) Zhou, Qiang (Beijing Jiaotong University) Markine, V.L. (TU Delft Railway Engineering) Jing, Guoqing (Beijing Jiaotong University) Date 2020 Abstract The rubber-protected ballast (RPB) is made from natural ballast particles and crumb rubber particles. The crumb rubber is shredded waste tires. RPB was chosen to replace the ballast as it has higher resistance to breakage and abrasion. However, the static and dynamic performance of the RPB has not been confirmed yet. Towards this end, experimental tests and numerical simulations were utilized to study the feasibility of RPB application. Direct shear tests (DSTs) were performed and a DST model and three-sleeper track model with the discrete element method (DEM) were built. The shear strength, settlement, displacement, and acceleration of the RPB were studied. The results show that the RPB has the advantage of increasing the force (stress) distribution and that the smaller crumb rubber size was more suitable for replacing the ballast particles. Subject Ballast degradationDEMDynamic performanceRailway ballastRPB To reference this document use: http://resolver.tudelft.nl/uuid:01838298-7e74-4931-8f65-1d40877de4d9 DOI https://doi.org/10.3390/su12072836 ISSN 2071-1050 Source Sustainability, 12 (7), 1-31 Part of collection Institutional Repository Document type journal article Rights © 2020 Y. Guo, Yameng Ji, Qiang Zhou, V.L. Markine, Guoqing Jing Files PDF sustainability_12_02836_v2.pdf 14.43 MB Close viewer /islandora/object/uuid:01838298-7e74-4931-8f65-1d40877de4d9/datastream/OBJ/view