DEM Modelling on the Interface Behavior of Geogrid-Stabilized Sub-Ballast

Ngo, T; Indraratna, B; Rujikiatkamjorn, C

DEM Modelling on the Interface Behavior of Geogrid-Stabilized Sub-Ballast

Ngo, T Indraratna, B

Rujikiatkamjorn, C

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Publisher:: American Society of Civil Engineers
Publication Type:: Conference Proceeding
Citation:: Geotechnical Special Publication, 2022, 2022-March, (GSP 331), pp. 486-495
Issue Date:: 2022-01-01

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Field	Value	Language
dc.contributor.author	Ngo, T
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.date.accessioned	2022-04-27T08:44:04Z
dc.date.available	2022-04-27T08:44:04Z
dc.date.issued	2022-01-01
dc.identifier.citation	Geotechnical Special Publication, 2022, 2022-March, (GSP 331), pp. 486-495
dc.identifier.issn	0895-0563
dc.identifier.uri	http://hdl.handle.net/10453/156676
dc.description.abstract	This paper presents a study on the interface behavior of geogrids and sub-ballast (capping) using a series of large-scale direct shear tests and discrete element modelling (DEM). Direct shear tests were carried out on sub-ballast with and without geogrid inclusions. The laboratory test data show that the interface shear strength is governed by normal stress and types of geogrid. The three-dimensional DEM was used to study the interface shear behavior of the sub-ballast subjected to direct shearing loads. Irregular-shaped particles of capping aggregates were modelled by clumping of many balls together in appropriate sizes and positions. Different types of geogrids were modelled by bonding small spheres together to form the desired grid geometry and apertures. The DEM model was then used to investigate the evolutions of contact force distributions and fabric anisotropy during the shear tests and the role of geogrid in micro-mechanical perspective.
dc.language	en
dc.publisher	American Society of Civil Engineers
dc.relation.ispartof	Geotechnical Special Publication
dc.relation.ispartof	Geo-Congress 2022
dc.relation.isbasedon	10.1061/9780784484012.050
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject.classification	Geological & Geomatics Engineering
dc.title	DEM Modelling on the Interface Behavior of Geogrid-Stabilized Sub-Ballast
dc.type	Conference Proceeding
utslib.citation.volume	2022-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	open_access	*
utslib.copyright.embargo	2023-01-01T00:00:00+1000Z
dc.date.updated	2022-04-27T08:44:02Z
pubs.issue	GSP 331
pubs.publication-status	Published
pubs.volume	2022-March
utslib.citation.issue	GSP 331

Abstract:

This paper presents a study on the interface behavior of geogrids and sub-ballast (capping) using a series of large-scale direct shear tests and discrete element modelling (DEM). Direct shear tests were carried out on sub-ballast with and without geogrid inclusions. The laboratory test data show that the interface shear strength is governed by normal stress and types of geogrid. The three-dimensional DEM was used to study the interface shear behavior of the sub-ballast subjected to direct shearing loads. Irregular-shaped particles of capping aggregates were modelled by clumping of many balls together in appropriate sizes and positions. Different types of geogrids were modelled by bonding small spheres together to form the desired grid geometry and apertures. The DEM model was then used to investigate the evolutions of contact force distributions and fabric anisotropy during the shear tests and the role of geogrid in micro-mechanical perspective.

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http://hdl.handle.net/10453/156676