Track – Bridge Interaction on High Speed Railways – the ONCF Experience 
Mohammed Touati1, Nouzha Lamdouar2, Laila Bouhlal3
1Mohammed Touati*, Civil Department, Mohammedia Engineering school, Mohammed 5 University, Rabat, Morocco.
2Nouzha Lamdouar, Civil Department, Mohammedia Engineering school, Mohammed 5 University, Rabat, Morocco.
3Laila Bouhlal, Civil Department, Mohammedia Engineering school, Mohammed 5 University, Rabat, Morocco.
Manuscript received on November 12, 2019. | Revised Manuscript received on November 25, 2019. | Manuscript published on 30 November, 2019. | PP: 4607-4612 | Volume-8 Issue-4, November 2019. | Retrieval Number: D8702118419/2019©BEIESP | DOI: 10.35940/ijrte.D8702.118419
Open Access | Ethics and Policies | Cite | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper aims to describe the Moroccan experience on Track – Bridge interaction in railway domain. In fact, that phenomenon may induce a general track instability compromising train security if it’s not taken into account in the study phase. To that end, a numerical method, used to compute the additional longitudinal stresses on a continuously welded rail (CWR) mainly associated to relative displacements between track and deck on account of temperature variations, is presented. Therefore, the conditions of laying an expansion device will be concluded, particularly when the additional rail stresses exceed the maximum limit values defined on the current standards. An application of that method will be performed on MHARHAR viaduct where a non-compliance of track dilatation device laying was noticed. This study will emphasize the beginning of a track grid general instability due to ballast layer deconsolidation, the all based on a track geometry measurement. This study may be widely used in order to conceive properly a bridge supposed to receive a CWR track.
Keywords: Track-Bridge Interaction, Railway Bridge, Continuously Welded Rail, Rail Stress, Track Dilatation Device, Track Geometry.
Scope of the Article: Soil-Structure Interaction.