Dong, K, Connolly, DP, Laghrouche, O et al. (3 more authors) (2018) The Effect of Soil Non-linearity on Mixed Traffic Railway Lines: Passenger vs Freight Loads. In: Shi, X, Liu, Z and Liu, J, (eds.) Proceedings of GeoShanghai 2018 International Conference: Transportation Geotechnics and Pavement Engineering. GSIC2018: GeoShanghai International Conference, 27-30 May 2018, Shanghai, China. Springer , pp. 227-236. ISBN 978-981-13-0010-3
Abstract
To add additional capacity to railway networks, freight services might be added to lines that have previously only be used for passenger services. Existing ballasted lines may have mixed subgrade conditions and thus the effect of increased axle loads on track behavior is unclear. Typically, such cases will result in elevated track deflections in comparison to passenger vehicles. As a result, the supporting subgrade experiences higher strain levels, which can fall into the large strain range. The related non-linear subgrade behavior plays an important role in track response but is challenging to model. As a solution, this paper presents a new semi-analytical numerical model, where the track is simulated analytically and allows for 1D wave propagation. The ground is modelled using a non-linear equivalent thin-layer finite element formulation. This allows for the subgrade stiffness to be updated in an iterative manner with minimal computational effort. A case study is presented to show that modest increases in axle load can have a marked effect on track deflections.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | © Springer Nature Singapore Pte Ltd. 2018. This is an author produced version of a conference paper published in Proceedings of GeoShanghai 2018 International Conference: Transportation Geotechnics and Pavement Engineering. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Railway freight; Railroad; Non-linear soil |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 05 Jun 2019 12:41 |
Last Modified: | 24 Sep 2019 08:57 |
Status: | Published |
Publisher: | Springer |
Identification Number: | 10.1007/978-981-13-0011-0_25 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:146720 |