Modelling of geocell-reinforced subballast subjected to cyclic loading

Biabani, MM; Indraratna, B; Ngo, NT

Modelling of geocell-reinforced subballast subjected to cyclic loading

Biabani, MM Indraratna, B

Ngo, NT

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Geotextiles and Geomembranes, 2016, 44, (4), pp. 489-503
Issue Date:: 2016-08-01

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Field	Value	Language
dc.contributor.author	Biabani, MM
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Ngo, NT
dc.date.accessioned	2022-07-27T23:45:36Z
dc.date.available	2022-07-27T23:45:36Z
dc.date.issued	2016-08-01
dc.identifier.citation	Geotextiles and Geomembranes, 2016, 44, (4), pp. 489-503
dc.identifier.issn	0266-1144
dc.identifier.issn	1879-3584
dc.identifier.uri	http://hdl.handle.net/10453/159221
dc.description.abstract	This paper presents the experimental and numerical studies of geocell-reinforced subballast subjected to cyclic loading. A series of laboratory experiments were conducted using a large-scale prismoidal triaxial apparatus that was subjected to relatively low confining pressures of σ'3 = 10-30 kPa and a frequency of f = 10 Hz. Numerical simulations were performed using the commercial finite element package ABAQUS in three dimensions to realistically model cellular confinement, and to study the effectiveness of geocell reinforcement on subballast. A cyclic loading with a periodic and positive full-sine waveform was adopted to model the geocell-reinforced subballast, which is similar to the load carried out in the laboratory. The results of numerical modelling agreed well with the experimental data, and showed that geocell could effectively decrease the lateral and axial deformations of the reinforced subballast. The numerical model was also validated by the field data, and the results were found to be in good agreement, indicating that the proposed model was able to capture the load-deformation behaviour of geocell-reinforced subballast under cyclic loading. A parametric study was also carried out to evaluate the effect of the subballast strength and geocell stiffness on the mobilized tensile strength in the geocell mattress. It was found that the maximum mobilized tensile stress occurs on the subballast with the lowest degree of stiffness. Also the results revealed that lateral displacement decreased further by increasing geocell stiffness, and geocell with a relatively low stiffness performs very well compared to the geocell with a higher stiffness.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Geotextiles and Geomembranes
dc.relation.isbasedon	10.1016/j.geotexmem.2016.02.001
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0915 Interdisciplinary Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Modelling of geocell-reinforced subballast subjected to cyclic loading
dc.type	Journal Article
utslib.citation.volume	44
utslib.for	0905 Civil Engineering
utslib.for	0915 Interdisciplinary Engineering
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	2022-07-27T23:45:32Z
pubs.issue	4
pubs.publication-status	Published
pubs.volume	44
utslib.citation.issue	4

Abstract:

This paper presents the experimental and numerical studies of geocell-reinforced subballast subjected to cyclic loading. A series of laboratory experiments were conducted using a large-scale prismoidal triaxial apparatus that was subjected to relatively low confining pressures of σ'3 = 10-30 kPa and a frequency of f = 10 Hz. Numerical simulations were performed using the commercial finite element package ABAQUS in three dimensions to realistically model cellular confinement, and to study the effectiveness of geocell reinforcement on subballast. A cyclic loading with a periodic and positive full-sine waveform was adopted to model the geocell-reinforced subballast, which is similar to the load carried out in the laboratory. The results of numerical modelling agreed well with the experimental data, and showed that geocell could effectively decrease the lateral and axial deformations of the reinforced subballast. The numerical model was also validated by the field data, and the results were found to be in good agreement, indicating that the proposed model was able to capture the load-deformation behaviour of geocell-reinforced subballast under cyclic loading. A parametric study was also carried out to evaluate the effect of the subballast strength and geocell stiffness on the mobilized tensile strength in the geocell mattress. It was found that the maximum mobilized tensile stress occurs on the subballast with the lowest degree of stiffness. Also the results revealed that lateral displacement decreased further by increasing geocell stiffness, and geocell with a relatively low stiffness performs very well compared to the geocell with a higher stiffness.

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http://hdl.handle.net/10453/159221