The effect of non-linear soil behavior on mixed traffic railway lines

K. Dong, O. Laghrouche, D. P. Connolly, P. K. Woodward, P. Alves Costa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Railway freight services can be added to lines that have previously only be used for passenger services, with the aim of increasing network capacity. Freight trains have larger axle loads and thus can have a negative effect on track longevity, particularly on ballasted lines supported by sub-optimal ground conditions. This is because larger subgrade strains are generated, which can result in non-linear behavior. Therefore it is important to be able to determine the effect of the new rolling stock on track behavior before operation. This is challenging to do because non-linear soil behavior is challenging to simulate. As a solution, this paper presents an equivalent non-linear, thin layer element soil model, coupled to an analytical track model. It is capable of quickly and accurately computing the response of non-linear track behavior. The model is used to investigate the effect of introducing freight wagons on an existing ballasted passenger line with poor ground conditions.

Original languageEnglish
Title of host publicationNumerical methods in geotechnical engineering IX
EditorsAntónio S. Cardoso, José L. Borges, Pedro A. Costa, António T. Gomes, José C. Marques, Castorina S. Vieira
PublisherCRC Press/Balkema
Chapter68
Pages1445-1449
Number of pages5
Volume2
ISBN (Electronic)9780429446924
ISBN (Print)9781138332034
DOIs
Publication statusPublished - 2018
Event9th European Conference on Numerical Methods in Geotechnical Engineering 2018 - Porto, Portugal
Duration: 25 Jun 201827 Jun 2018

Conference

Conference9th European Conference on Numerical Methods in Geotechnical Engineering 2018
Abbreviated titleNUMGE 2018
CountryPortugal
CityPorto
Period25/06/1827/06/18

ASJC Scopus subject areas

  • Numerical Analysis
  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Dong, K., Laghrouche, O., Connolly, D. P., Woodward, P. K., & Alves Costa, P. (2018). The effect of non-linear soil behavior on mixed traffic railway lines. In A. S. Cardoso, J. L. Borges, P. A. Costa, A. T. Gomes, J. C. Marques, & C. S. Vieira (Eds.), Numerical methods in geotechnical engineering IX (Vol. 2, pp. 1445-1449). CRC Press/Balkema. https://doi.org/10.1201/9780429446924-68