Impact of train speed on the mechanical behaviours of track-bed materials

Autor: Tongwei Zhang, Francisco Lamas-Lopez, Yu-Jun Cui, Nicolas Calon, Sofia Costa D’Aguiar

Publikováno v: Journal of Rock Mechanics and Geotechnical Engineering, Vol 9, Iss 5, Pp 818-829 (2017)

For the 30,000 km long French conventional railway lines (94% of the whole network), the train speed is currently limited to 220 km/h, whilst the speed is 320 km/h for the 1800 km long high-speed lines. Nowadays, there is a growing need to improve th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::065e73c8aa8657ffb1bf4c684f77c79d
https://doi.org/10.1016/j.jrmge.2017.03.018

Randomly-fluctuating heterogeneous continuum model of a ballasted railway track

Autor: Lucio de Abreu Correa, Régis Cottereau, Charles Voivret, Juan Carlos Quezada, Sofia Costa D’Aguiar

Publikováno v: Computational Mechanics
Computational Mechanics, Springer Verlag, 2017, 60 (5), pp.845-861. ⟨10.1007/s00466-017-1446-8⟩
Computational Mechanics, 2017, 60 (5), pp.845-861. ⟨10.1007/s00466-017-1446-8⟩

International audience; This paper proposes a description of a granular medium as a stochastic heterogeneous continuum medium. The heterogeneity of the material properties field recreates the heterogeneous stress field in a granular medium. The stoch

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::506218dd8eb181de75e0ab130c4ca7dc
https://hal.archives-ouvertes.fr/hal-01635950/file/Correa2016.pdf

Stochastic heterogeneous material modeling for wave propagation in a ballast layer

Autor: Régis Cottereau, Sofia Costa D’Aguiar, Lucio de Abreu Correa, Charles Voivret, Baldrick Faure, Estelle Bongini

Publikováno v: EPJ Web of Conferences, Vol 140, p 11012 (2017)

This paper discusses the dynamical behavior of a randomly-fluctuating heterogeneous continuum model of the ballast. The Young’s modulus is modeled as a random field parameterized by its average, its variance and a correlation model. A numerical mod

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a7586024b623c89837bc161a20257732
https://doaj.org/article/9187f172dfca471781e7ebf796261229

Track-bed mechanical behaviour under the impact of train at different speeds

Autor: Tongwei Zhang, Yu-Jun Cui, Sofia Costa D’Aguiar, Matheus Peixoto De Oliveira, Nicolas Calon, Francisco Lamas-Lopez

Publikováno v: Soils and Foundations
Soils and Foundations, Japanese Geotechnical Society, 2016, 56 (4), pp.627-639. ⟨10.1016/j.sandf.2016.07.004⟩

International audience; This paper aims to study the influence of train speed on the mechanical behaviour of track-bed materials based on field data recorded at a representative site of the conventional French network. Capacitive accelerometers soil

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95e7d3ac746671e516841e9fbd0c290c
https://hal-enpc.archives-ouvertes.fr/hal-01573702

Investigation of interlayer soil behaviour by field monitoring

Autor: Francisco Lamas-Lopez, Alain Robinet, Nicolas Calon, Sofia Costa D’Aguiar, Jean Canou, Anh Minh Tang, Jean-Claude Dupla, Viet Nam Trinh, Yu-Jun Cui

Publikováno v: Transportation Geotechnics
Transportation Geotechnics, Elsevier, 2014, 1 (3), pp.91-105. ⟨10.1016/j.trgeo.2014.04.002⟩
Transportation Geotechnics, Elsevier, 2014, 1 (3), pp.91-105

International audience; As opposed to the new ballasted railway tracks where a sub-ballast layer is often emplaced, the conventional railway tracks were constructed with ballast directly emplaced on the natural sub-soils. Thereby, a layer of mixed ma

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47d50e73927ad7c23465dcca8c78cbed
https://hal.archives-ouvertes.fr/hal-01977802