Abstract
The long term performance of the railway tracks is a relevant topic and a major concern of the railway Infrastructure Managers due to the technical and economical aspects related to the degradation of the track. Thus, there are several factors that have a significant influence on the short and long term performance of the ballasted and ballastless tracks. One of these factors is the train speed (which also includes the critical speed) since the stresses and strains are significantly amplified. This work tries to compare the short but mostly the long term performance of the ballasted and the ballastless track (Rheda system) and also an optimised version of the Rheda system, where the support layers (HBL and FPL) are omitted. This comparison includes the influence of the train speed (and critical speed) and it is based on the stress levels and cumulative permanent deformation induced by the passage of the train. The results were obtained using a hybrid methodology between the 2.5D FEM-PML (to model the short term behaviour) and the implementation of an empirical permanent deformation model (to analyse the long term performance).
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Ramos, A., Correia, A.G., Calçada, R. (2023). Influence of the Train Speed on the Long Term Performance of the Subgrade of the Ballasted and Ballastless Tracks. In: Dai, H. (eds) Computational and Experimental Simulations in Engineering. ICCES 2022. Mechanisms and Machine Science, vol 119. Springer, Cham. https://doi.org/10.1007/978-3-031-02097-1_2
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