Deformation of Unbound Granular Materials in Three-Dimensional Stress State

Vaseghi, S; Sheng, D; Kodikara, J; Khabbaz, H

Deformation of Unbound Granular Materials in Three-Dimensional Stress State

Vaseghi, S Sheng, D

Kodikara, J Khabbaz, H

Permalink

Publisher:: AMER SOC CIVIL ENGINEERS
Publication Type:: Conference Proceeding
Citation:: Geotechnical Special Publication, 2024, 2024-February, (GSP 353), pp. 256-265
Issue Date:: 2024-01-01

In Progress

	Filename	Description	Size
	vaseghi-et-al-2024-deformation-of-unbound-granular-materials-in-three-dimensional-stress-state.pdf	Published version	497.13 kB		View/Open

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is being processed and is not currently available.

Full metadata record

Field	Value	Language
dc.contributor.author	Vaseghi, S
dc.contributor.author	Sheng, D https://orcid.org/0000-0002-1665-6931
dc.contributor.author	Kodikara, J
dc.contributor.author	Khabbaz, H
dc.contributor.editor	Evans, TM
dc.contributor.editor	Stark, N
dc.contributor.editor	Chang, S
dc.date	2024-02-25
dc.date.accessioned	2025-03-13T23:50:37Z
dc.date.available	2025-03-13T23:50:37Z
dc.date.issued	2024-01-01
dc.identifier.citation	Geotechnical Special Publication, 2024, 2024-February, (GSP 353), pp. 256-265
dc.identifier.issn	0895-0563
dc.identifier.uri	http://hdl.handle.net/10453/185795
dc.description.abstract	Unbound granular materials (UGMs) are extensively used in pavements mostly as subgrade and subbase materials. Excessive permanent settlement or rutting is the main damage mechanism encountered in UGMs. Rutting is a result of accumulated gradual plastic strain in the subbase and subgrade layers subjected to repetitive traffic loadings. Axisymmetric triaxial apparatus or repeated lateral triaxial (RLT) devices are commonly used to explore the rutting of UGMs. However, these devices are not able to capture the actual stress state generated in traffic. A soil element in pavement layers is in a three-dimensional (3D) stress state and includes all three components of cyclic principal stresses. A typical pavement also can be considered geometrically as a plane strain structure. Accordingly, aim of this study is to carry out experiments to determine the long-term deformation of a silty sand in plane strain and in a 3D stress state using a multistage true triaxial apparatus (TTA). It is found that the permanent deformation of UGMs under plane strain and 3D anisotropic stress state differs significantly from that under axisymmetric stress. An increase in the intermediate principal stress was observed to decrease the total and permanent deformation. An increase in cyclic stress level was also found to increase the rutting in UGMs. The deformation of soil under the plane strain state was found to be less than that in the axisymmetric stress state but falls into an intermediate range when compared to tests involving 3D cyclic loading.
dc.language	en
dc.publisher	AMER SOC CIVIL ENGINEERS
dc.relation.ispartof	Geotechnical Special Publication
dc.relation.ispartof	Geo-Congress on Bridging Government, Industry, and Academia for Resilient Mega-Communities
dc.relation.isbasedon	10.1061/9780784485354.025
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Deformation of Unbound Granular Materials in Three-Dimensional Stress State
dc.type	Conference Proceeding
utslib.citation.volume	2024-February
utslib.location.activity	CANADA, Vancouver
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
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Technology in Water and Wastewater (CTWW)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Transport Research Centre (TRC)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Advanced Modelling and Geospatial lnformation Systems (CAMGIS)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Built Infrastructure Resilience (CBIR)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Technology in Water and Wastewater (CTWW)/Centre for Technology in Water and Wastewater (CTWW) Associate Members
utslib.copyright.status	in_progress	*
dc.date.updated	2025-03-13T23:50:32Z
pubs.finish-date	2024-02-28
pubs.issue	GSP 353
pubs.publication-status	Published
pubs.start-date	2024-02-25
pubs.volume	2024-February
utslib.citation.issue	GSP 353

Abstract:

Unbound granular materials (UGMs) are extensively used in pavements mostly as subgrade and subbase materials. Excessive permanent settlement or rutting is the main damage mechanism encountered in UGMs. Rutting is a result of accumulated gradual plastic strain in the subbase and subgrade layers subjected to repetitive traffic loadings. Axisymmetric triaxial apparatus or repeated lateral triaxial (RLT) devices are commonly used to explore the rutting of UGMs. However, these devices are not able to capture the actual stress state generated in traffic. A soil element in pavement layers is in a three-dimensional (3D) stress state and includes all three components of cyclic principal stresses. A typical pavement also can be considered geometrically as a plane strain structure. Accordingly, aim of this study is to carry out experiments to determine the long-term deformation of a silty sand in plane strain and in a 3D stress state using a multistage true triaxial apparatus (TTA). It is found that the permanent deformation of UGMs under plane strain and 3D anisotropic stress state differs significantly from that under axisymmetric stress. An increase in the intermediate principal stress was observed to decrease the total and permanent deformation. An increase in cyclic stress level was also found to increase the rutting in UGMs. The deformation of soil under the plane strain state was found to be less than that in the axisymmetric stress state but falls into an intermediate range when compared to tests involving 3D cyclic loading.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/185795