Modelling of Tracks at Transition Zones: Analytical and Numerical Modelling Approach

Sajjad, MB; Indraratna, B; Ngoc Ngo, T; Rujikiatkamjorn, C

Modelling of Tracks at Transition Zones: Analytical and Numerical Modelling Approach

Sajjad, MB Indraratna, B

Ngoc Ngo, T Rujikiatkamjorn, C

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Publisher:: American Society of Civil Engineers (ASCE)
Publication Type:: Conference Proceeding
Citation:: Geotechnical Special Publication, 2023, 2023-March, (GSP 342), pp. 22-29
Issue Date:: 2023-01-01

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Field	Value	Language
dc.contributor.author	Sajjad, MB
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-2346-8250
dc.contributor.author	Ngoc Ngo, T
dc.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.date.accessioned	2023-05-05T01:47:13Z
dc.date.available	2023-05-05T01:47:13Z
dc.date.issued	2023-01-01
dc.identifier.citation	Geotechnical Special Publication, 2023, 2023-March, (GSP 342), pp. 22-29
dc.identifier.isbn	9780784484708
dc.identifier.issn	0895-0563
dc.identifier.uri	http://hdl.handle.net/10453/170208
dc.description.abstract	Rail track transitions are the discontinuities along the railway lines where conventional track adjoins the tunnels and bridges and are responsible for a sudden change in track structural properties. Frequent movement of fast passenger trains and heavy freights cause enhanced impact loads and differential settlements at these transitions that further lead to accelerated track degradation and increased maintenance costs. This paper presents a brief introduction to track transitions, the associated problems, and their causes and explains the occurrence of differential settlement at track transitions through analytical and numerical (2D FEM) modelling approaches. The stiffness effect on track settlement response under train loading is investigated, considering an Euler-Bernoulli beam on elastic foundation (BOEF). Vertical displacements of the track are calculated for various track stiffness values under train wheel loading (P = 10 tonnes). The results proved that the stiffer tracks undergo lesser settlements than the softer tracks. The effect of sudden stiffness variation is investigated by considering a one-step track transition where the stiffness suddenly changes from 80 MN/m (slab track) to 5 MN/m (ballast track). The results show that the settlement on ballasted track is almost 12 times greater than those on the slab track resulting in a large differential settlement at track transition.
dc.language	en
dc.publisher	American Society of Civil Engineers (ASCE)
dc.relation	http://purl.org/au-research/grants/arc/DP220102862
dc.relation.ispartof	Geotechnical Special Publication
dc.relation.ispartof	Geo-Congress 2023
dc.relation.isbasedon	10.1061/9780784484692.003
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Modelling of Tracks at Transition Zones: Analytical and Numerical Modelling Approach
dc.type	Conference Proceeding
utslib.citation.volume	2023-March
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	closed_access	*
dc.date.updated	2023-05-05T01:47:12Z
pubs.issue	GSP 342
pubs.publication-status	Published
pubs.volume	2023-March
utslib.citation.issue	GSP 342

Abstract:

Rail track transitions are the discontinuities along the railway lines where conventional track adjoins the tunnels and bridges and are responsible for a sudden change in track structural properties. Frequent movement of fast passenger trains and heavy freights cause enhanced impact loads and differential settlements at these transitions that further lead to accelerated track degradation and increased maintenance costs. This paper presents a brief introduction to track transitions, the associated problems, and their causes and explains the occurrence of differential settlement at track transitions through analytical and numerical (2D FEM) modelling approaches. The stiffness effect on track settlement response under train loading is investigated, considering an Euler-Bernoulli beam on elastic foundation (BOEF). Vertical displacements of the track are calculated for various track stiffness values under train wheel loading (P = 10 tonnes). The results proved that the stiffer tracks undergo lesser settlements than the softer tracks. The effect of sudden stiffness variation is investigated by considering a one-step track transition where the stiffness suddenly changes from 80 MN/m (slab track) to 5 MN/m (ballast track). The results show that the settlement on ballasted track is almost 12 times greater than those on the slab track resulting in a large differential settlement at track transition.

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http://hdl.handle.net/10453/170208