Please use this identifier to cite or link to this item: https://hdl.handle.net/1822/74869

TitleInfluence of track foundation on the performance of ballast and concrete slab tracks under cyclic loading: physical modelling and numerical model calibration
Author(s)Ramos, A.
Correia, A. Gomes
Calçada, R.
Costa, P. Alves
Esen, A.
Woodward, P. K.
Connolly, D. P.
Laghrouche, O.
KeywordsRailroad ballast track
Concrete slab track
Railway physical modelling
Cyclic track testing
Numerical model calibration
Settlement
Issue date2021
PublisherElsevier
JournalConstruction and Building Materials
CitationA. Ramos, A. Gomes Correia, R. Calçada, P. Alves Costa, A. Esen, P.K. Woodward, D.P. Connolly, O. Laghrouche, Influence of track foundation on the performance of ballast and concrete slab tracks under cyclic loading: Physical modelling and numerical model calibration, Construction and Building Materials, Volume 277, 2021, 122245, https://doi.org/10.1016/j.conbuildmat.2021.122245
Abstract(s)In this paper, the performance of different railway structures – ballasted and two types of slab tracks (Rheda system and a ballastless track only constituted by the concrete slab) – is evaluated in terms of stresses and permanent deformations through the selection of some important parameters: wavelength of the unevenness profile, train’s speed, subgrade’s characteristics and spatial variability of the track unevenness profile. The elastodynamic response of 60 case studies is computed through a 2.5D model FEM-PML and the long-term behaviour is assessed by the implementation of a permanent deformation model. The obtained results are analysed through innovative stress and permanent deformation amplification factors in the subgrade layer. This study concludes that the train’s speed and the mechanical properties of the subgrade are the factors that most affect the long-term performance of the subgrade of railway structures, which must be considered for further optimization of the rail track structures.
TypeArticle
URIhttps://hdl.handle.net/1822/74869
DOI10.1016/j.conbuildmat.2021.122245
ISSN0950-0618
Publisher versionhttps://www.sciencedirect.com/science/article/abs/pii/S0950061821000052
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:ISISE - Artigos em Revistas Internacionais

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