Calibration of a simple anisotropic plasticity model for soft clays

Papadimitriou, AG; Manzari, MT; Dafalias, YF

dc.contributor.author	Papadimitriou, AG	en
dc.contributor.author	Manzari, MT	en
dc.contributor.author	Dafalias, YF	en
dc.date.accessioned	2014-03-01T02:50:00Z
dc.date.available	2014-03-01T02:50:00Z
dc.date.issued	2005	en
dc.identifier.issn	08950563	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34866
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-27644442350&partnerID=40&md5=469b8bbbfadb84927d774813ec89aba2	en
dc.subject.other	Anisotropic plasticity models	en
dc.subject.other	Cam Clay models	en
dc.subject.other	Soft clays	en
dc.subject.other	Triaxial shearing	en
dc.subject.other	Anisotropy	en
dc.subject.other	Calibration	en
dc.subject.other	Characterization	en
dc.subject.other	Hardening	en
dc.subject.other	Plasticity	en
dc.subject.other	Soils	en
dc.subject.other	Stress analysis	en
dc.subject.other	Geologic models	en
dc.title	Calibration of a simple anisotropic plasticity model for soft clays	en
heal.type	conferenceItem	en
heal.publicationDate	2005	en
heal.abstract	This paper presents the calibration process of a recently proposed simple anisotropic plasticity model, which provides successful simulation of the rate-independent behavior of soft clays. The model is characterized by a non-associative flow rule, which is introduced by adopting a yield surface different than the plastic potential surface. Besides the isotropic hardening of the yield surface, both elliptical surfaces evolve according to a combined distortional and rotational hardening rule, simulating the evolving anisotropy. The model is simple enough to require merely three (3) constants more than those of the Modified Cam Clay model. Their calibration requires data from undrained triaxial tests and at least one constant stress-ratio test (e.g. Ko consolidation) with lateral stress measurements. For the sake of simplicity, two of these three constants are calibrated using analytical relations, and merely a single constant necessitates trial-and-error runs of the model. The paper presents the step-by-step calibration process for Boston Blue Clay and presents the model performance for triaxial shearing of the same clay, as well as the Lower Cromer Till.	en
heal.journalName	Geotechnical Special Publication	en
dc.identifier.issue	128	en
dc.identifier.spage	415	en
dc.identifier.epage	424	en