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Civil-Comp Conferences
ISSN 2753-3239
CCC: 1
PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 19.4

Auxiliary rails as a mitigation measure for degradation in transition zones

A.B. Faragau, A. Jain, J.M. de Oliveira Barbosa, A.V. Metrikine and K.N. van Dalen

Faculty of Civil Engineering and Geosciences, Delft University of Technology, The Netherlands

Full Bibliographic Reference for this paper
A.B. Faragau, A. Jain, J.M. de Oliveira Barbosa, A.V. Metrikine, K.N. van Dalen, "Auxiliary rails as a mitigation measure for degradation in transition zones", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 19.4, 2022, doi:10.4203/ccc.1.19.4
Keywords: transition zone, auxiliary rails, settlement mechanisms.

Abstract
This paper studies the effectiveness of adding auxiliary rails as a mitigation measure for degradation in transition zones of railway tracks. More specifically, it investigates the settlement mechanisms counteracted by the additional rails. Results show that when the systemís response is in the quasi-static regime, adding auxiliary rails over the soft part of the transition zone is beneficial while adding them over the whole transition zone is not. Furthermore, the auxiliary rails have a beneficial impact also when the systemís response is in the dynamic regime; the beneficial effect is caused by the improved load distribution to the supporting structure and not from counteracting the dynamic response amplification that occurs at transition zones. While this mitigation measure has been previously investigated, the contribution of this study lies in a more in-depth analysis of the mechanism through which auxiliary rails can mitigate the degradation at transition zones.

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