Finite Element Modelling of Geogrids Reinforced Ballasted Tracks

Ngo, T; Hasan, M

Finite Element Modelling of Geogrids Reinforced Ballasted Tracks

Ngo, T Hasan, M

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Publisher:: SPRINGERNATURE
Publication Type:: Journal Article
Citation:: Transportation Infrastructure Geotechnology, 2024
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Ngo, T
dc.contributor.author	Hasan, M
dc.date.accessioned	2024-03-26T04:30:18Z
dc.date.available	2024-03-26T04:30:18Z
dc.date.issued	2024-01-01
dc.identifier.citation	Transportation Infrastructure Geotechnology, 2024
dc.identifier.issn	2196-7202
dc.identifier.issn	2196-7210
dc.identifier.uri	http://hdl.handle.net/10453/177179
dc.description.abstract	This paper presents results obtained from three-dimension finite element modelling (FEM) to study the effects of geogrids on the deformation responses of ballasted tracks. In this study, a series of numerical simulations are carried out on track sections with and without the inclusion of geogrids. Sensitivity analysis was carried on parameters affecting the performance of geogrid, including the axial stiffness, interface property and the location of geogrid placement in the track substructure. The tracks are subjected to moving train loading under 150 kN wheel load travelling at a given speed of 72 km/h. Based on simulation results, it is found that geogrid provides a reinforcing function to rail track primarily in the form of confinement which resulted in reduced lateral displacement in a reinforced track compared to a traditional track. A significant reduction in vertical and lateral displacement is found from the inclusion of a geogrid layer at the ballast and capping interface while the effect of geogrid reinforcement is more pronounced with increased loading cycles. The effects of geogrid stiffness, interface conditions and geogrid placement are studied and it is found that the axial stiffness of geogrid is found to impact overall track deformation while the optimum placement of geogrid is found to directly at the ballast and capping interface.
dc.language	English
dc.publisher	SPRINGERNATURE
dc.relation.ispartof	Transportation Infrastructure Geotechnology
dc.relation.isbasedon	10.1007/s40515-024-00381-y
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.rights	This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://dx.doi.org/10.1007/s40515-024-00381-y
dc.subject.classification	4005 Civil engineering
dc.title	Finite Element Modelling of Geogrids Reinforced Ballasted Tracks
dc.type	Journal Article
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	embargoed	*
utslib.copyright.embargo	2025-02-28T00:00:00+1000Z
dc.date.updated	2024-03-26T04:30:15Z
pubs.publication-status	Published

Abstract:

This paper presents results obtained from three-dimension finite element modelling (FEM) to study the effects of geogrids on the deformation responses of ballasted tracks. In this study, a series of numerical simulations are carried out on track sections with and without the inclusion of geogrids. Sensitivity analysis was carried on parameters affecting the performance of geogrid, including the axial stiffness, interface property and the location of geogrid placement in the track substructure. The tracks are subjected to moving train loading under 150 kN wheel load travelling at a given speed of 72 km/h. Based on simulation results, it is found that geogrid provides a reinforcing function to rail track primarily in the form of confinement which resulted in reduced lateral displacement in a reinforced track compared to a traditional track. A significant reduction in vertical and lateral displacement is found from the inclusion of a geogrid layer at the ballast and capping interface while the effect of geogrid reinforcement is more pronounced with increased loading cycles. The effects of geogrid stiffness, interface conditions and geogrid placement are studied and it is found that the axial stiffness of geogrid is found to impact overall track deformation while the optimum placement of geogrid is found to directly at the ballast and capping interface.

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http://hdl.handle.net/10453/177179