Applicability of Bouc-Wen Model to Capture Asymmetric Behavior of Sand at High Cyclic Shear Strain

Pain, A; Nimbalkar, S; Hussain, M

Applicability of Bouc-Wen Model to Capture Asymmetric Behavior of Sand at High Cyclic Shear Strain

Pain, A Nimbalkar, S

Hussain, M

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Publisher:: ASCE-AMER SOC CIVIL ENGINEERS
Publication Type:: Journal Article
Citation:: International Journal of Geomechanics, 2020, 20, (6)
Issue Date:: 2020-06-01

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Field	Value	Language
dc.contributor.author	Pain, A
dc.contributor.author	Nimbalkar, S https://orcid.org/0000-0002-1538-3396
dc.contributor.author	Hussain, M
dc.date.accessioned	2020-10-31T21:30:54Z
dc.date.available	2020-10-31T21:30:54Z
dc.date.issued	2020-06-01
dc.identifier.citation	International Journal of Geomechanics, 2020, 20, (6)
dc.identifier.issn	1532-3641
dc.identifier.issn	1943-5622
dc.identifier.uri	http://hdl.handle.net/10453/143655
dc.description.abstract	© 2020 American Society of Civil Engineers. Seismic response evaluation of the site of interest subjected to a bedrock motion is one of the most important problems in earthquake geotechnical engineering. For one-dimensional (1D) nonlinear site response analysis in the time domain, a stress-strain relationship is inevitable. Most of the available stress-strain relationships provide greater hysteresis damping for medium to large strains compared with the damping values obtained in dynamic tests because hysteresis loops become progressively asymmetric with increasing shear strain. In the present study, a calibration scheme is proposed for a generalized Bouc-Wen model to capture the asymmetric behavior of soil at the high cyclic shear strain. The degradation parameters and pore-water pressure are expressed as a function of dissipated hysteretic energy. Particle swarm optimization (PSO) is used to identify the model parameters with the experimental data. The calibrated model could successfully capture the stiffness decay, loss of strength, excess pore-water pressure, and asymmetric behavior of saturated sand and silty sand for the high cyclic shear strain.
dc.language	English
dc.publisher	ASCE-AMER SOC CIVIL ENGINEERS
dc.relation.ispartof	International Journal of Geomechanics
dc.relation.isbasedon	10.1061/(ASCE)GM.1943-5622.0001671
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0905 Civil Engineering, 0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	General Mathematics
dc.title	Applicability of Bouc-Wen Model to Capture Asymmetric Behavior of Sand at High Cyclic Shear Strain
dc.type	Journal Article
utslib.citation.volume	20
utslib.for	0905 Civil Engineering
utslib.for	0914 Resources Engineering and Extractive Metallurgy
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
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
utslib.copyright.status	closed_access	*
dc.date.updated	2020-10-31T21:30:35Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	20
utslib.citation.issue	6

Abstract:

© 2020 American Society of Civil Engineers. Seismic response evaluation of the site of interest subjected to a bedrock motion is one of the most important problems in earthquake geotechnical engineering. For one-dimensional (1D) nonlinear site response analysis in the time domain, a stress-strain relationship is inevitable. Most of the available stress-strain relationships provide greater hysteresis damping for medium to large strains compared with the damping values obtained in dynamic tests because hysteresis loops become progressively asymmetric with increasing shear strain. In the present study, a calibration scheme is proposed for a generalized Bouc-Wen model to capture the asymmetric behavior of soil at the high cyclic shear strain. The degradation parameters and pore-water pressure are expressed as a function of dissipated hysteretic energy. Particle swarm optimization (PSO) is used to identify the model parameters with the experimental data. The calibrated model could successfully capture the stiffness decay, loss of strength, excess pore-water pressure, and asymmetric behavior of saturated sand and silty sand for the high cyclic shear strain.

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http://hdl.handle.net/10453/143655