Mechanical Behaviour Of Railway Track

Résumé: Stone pathways are very widely used in the railway sector because of their flexibility of the construction or maintenance point of view. To improve the effectiveness of this structure, it is necessary to control the mechanical behaviour of this complex structure whose traffic loads are transmitted to the platform (ballast and in adjacent layers) beams rail and the ties spaced regularly. In this study we propose a two-dimensional model simulating the structure path under environment Plaxis finite elements according to the boundaries conditions of the problem and idealizing the passage of the infinite to a finite beam which the extension of the rail consists of a rigid steel of (L) length based on spring of stiffness K whose response is similar to the infinite semielastic support continuous beam. This model is improved with consideration of the rigidity of the blocks in rotation. The analysis is carried out first in the elastic field, then we analyzed the structure with plastic deformation. Aparametric analysis is performed on the thickness of the layers, on the constant mechanical "E" and "􀈣", interaction of two blochets……... The comparison of this model is made from tests carry out on site. The results are very satisfactory. Parametric analysis is performed on the different mechanical parameters on thickness of layers.

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