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S. Lee, J. Lee, Y. Lim, G. Song, M. Sagong, "Numerical Prediction of Permanent Deformation in Asphalt Track Foundation", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 51, 2014. doi:10.4203/ccp.104.51

Keywords: permanent deformation, asphalt track foundation, finite element analysis, creep model, ABAQUS, full-size load tests, design method.

Summary

A hot mixed asphalt (HMA) layer is to be introduced as a trackbed foundation to provide greater bearing capacity onto track structure. Permanent deformations generated in the asphalt trackbed foundation are investigated in this study. A finite element (FE) prediction model was developed to simulate the permanent deformation performance of the asphalt track foundation. A concept of shakedown plastic modelling based on the conventional elasto-plastic theory was adapted. Some factors affecting significant effects on permanent deformations of asphalt mixtures have been identified. The general finite element program ABAQUS is used in this study. The computed plastic deformations, by finite element simulation, of the asphalt track model were compared to measured ones obtained from full-size load tests of the asphalt track, with increasing load repetition. The computed results show that the creep model available in the ABAQUS model library, and proposed model factors in this study, can adequately simulate permanent deformations of the trackbed foundations in-service.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 104 PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 51 Numerical Prediction of Permanent Deformation in Asphalt Track Foundation S. Lee¹, J. Lee¹, Y. Lim², G. Song² and M. Sagong¹ ¹Korea Railway Research Institute, Korea ²Department of Civil and Railroad Engineering, Paichai University, Korea doi:10.4203/ccp.104.51 purchase the full-text of this paper Full Bibliographic Reference for this paper S. Lee, J. Lee, Y. Lim, G. Song, M. Sagong, "Numerical Prediction of Permanent Deformation in Asphalt Track Foundation", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 51, 2014. doi:10.4203/ccp.104.51 Keywords: permanent deformation, asphalt track foundation, finite element analysis, creep model, ABAQUS, full-size load tests, design method. Summary A hot mixed asphalt (HMA) layer is to be introduced as a trackbed foundation to provide greater bearing capacity onto track structure. Permanent deformations generated in the asphalt trackbed foundation are investigated in this study. A finite element (FE) prediction model was developed to simulate the permanent deformation performance of the asphalt track foundation. A concept of shakedown plastic modelling based on the conventional elasto-plastic theory was adapted. Some factors affecting significant effects on permanent deformations of asphalt mixtures have been identified. The general finite element program ABAQUS is used in this study. The computed plastic deformations, by finite element simulation, of the asphalt track model were compared to measured ones obtained from full-size load tests of the asphalt track, with increasing load repetition. The computed results show that the creep model available in the ABAQUS model library, and proposed model factors in this study, can adequately simulate permanent deformations of the trackbed foundations in-service. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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