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Article: A model for natural soil with bonds

TitleA model for natural soil with bonds
Authors
KeywordsClays
Constitutive relations
Numerical modelling
Plasticity
Shear strength
Theoretical analysis
Issue Date2010
PublisherThomas Telford (ICE Publishing). The Journal's web site is located at http://www.geotechnique-ice.com
Citation
Geotechnique, 2010, v. 61 n. 2, p. 95-106 How to Cite?
AbstractThis paper presents a thermodynamically consistent constitutive model for natural soils with bonds. In the model, the free energy (the internal energy available to do work) is contributed partly by the so-called frozen or locked energy, whose evolution is assumed to be homogeneously related to the irrecoverable deformation. During loading, the bonds existing in the natural soil not only boost the dissipation rate but also liberate certain historically accumulated locked energy. Such effects, however, are diminished as loading proceeds and the bonds are destroyed. The novel aspect of the present model is that it accommodates both the Mohr-Coulomb and critical-state failure modes, and the two modes are unified through the evolution law of a thermodynamic force associated with the locked bonding energy. As compared with the classical Cam-clay models, the model contains two additional material constants, where one is proposed by Collins & Kelly to improve the shape of the yield surface, and the other is dedicated to bonding evolution. The calibration procedure for the material parameters is provided. The capability of the model is demonstrated by a series of model simulations on a hypothetical bonded soil under various triaxial loading paths, and the model response is also compared with representative testing results in the literature.
Persistent Identifierhttp://hdl.handle.net/10722/142333
ISSN
2015 Impact Factor: 2.0
2015 SCImago Journal Rankings: 2.837
ISI Accession Number ID
Funding AgencyGrant Number
Fundo para o Desenvolvimento das Ciencias e da Tecnologia (FDCT)
Macau SAR government013/2007/A1
Research Committee, University of MacauRG053/06-07S/YWM/FST
Funding Information:

The first author would like to acknowledge the Fundo para o Desenvolvimento das Ciencias e da Tecnologia (FDCT), Macau SAR government (Grant No. 013/2007/A1) and the Research Committee, University of Macau (Grant No. RG053/06-07S/YWM/FST) for their financial assistance at the initial stage of this research.

References

 

DC FieldValueLanguage
dc.contributor.authorYan, WMen_HK
dc.contributor.authorLi, XSen_HK
dc.date.accessioned2011-10-28T02:43:23Z-
dc.date.available2011-10-28T02:43:23Z-
dc.date.issued2010en_HK
dc.identifier.citationGeotechnique, 2010, v. 61 n. 2, p. 95-106en_HK
dc.identifier.issn0016-8505en_HK
dc.identifier.urihttp://hdl.handle.net/10722/142333-
dc.description.abstractThis paper presents a thermodynamically consistent constitutive model for natural soils with bonds. In the model, the free energy (the internal energy available to do work) is contributed partly by the so-called frozen or locked energy, whose evolution is assumed to be homogeneously related to the irrecoverable deformation. During loading, the bonds existing in the natural soil not only boost the dissipation rate but also liberate certain historically accumulated locked energy. Such effects, however, are diminished as loading proceeds and the bonds are destroyed. The novel aspect of the present model is that it accommodates both the Mohr-Coulomb and critical-state failure modes, and the two modes are unified through the evolution law of a thermodynamic force associated with the locked bonding energy. As compared with the classical Cam-clay models, the model contains two additional material constants, where one is proposed by Collins & Kelly to improve the shape of the yield surface, and the other is dedicated to bonding evolution. The calibration procedure for the material parameters is provided. The capability of the model is demonstrated by a series of model simulations on a hypothetical bonded soil under various triaxial loading paths, and the model response is also compared with representative testing results in the literature.en_HK
dc.languageengen_US
dc.publisherThomas Telford (ICE Publishing). The Journal's web site is located at http://www.geotechnique-ice.comen_HK
dc.relation.ispartofGeotechniqueen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPermission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees-
dc.subjectClaysen_HK
dc.subjectConstitutive relationsen_HK
dc.subjectNumerical modellingen_HK
dc.subjectPlasticityen_HK
dc.subjectShear strengthen_HK
dc.subjectTheoretical analysisen_HK
dc.titleA model for natural soil with bondsen_HK
dc.typeArticleen_HK
dc.identifier.emailYan, WM:ryanyan@hku.hken_HK
dc.identifier.authorityYan, WM=rp01400en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1680/geot.8.P.061en_HK
dc.identifier.scopuseid_2-s2.0-79551577686en_HK
dc.identifier.hkuros184474en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79551577686&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume61en_HK
dc.identifier.issue2en_HK
dc.identifier.spage95en_HK
dc.identifier.epage106en_HK
dc.identifier.isiWOS:000286589700001-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridYan, WM=35369531200en_HK
dc.identifier.scopusauthoridLi, XS=25823194900en_HK

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