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dc.contributor.author Blatz, JA
dc.contributor.author Graham, J
dc.contributor.author Chandler, NA
dc.date.accessioned 2007-09-10T11:40:31Z
dc.date.available 2007-09-10T11:40:31Z
dc.date.issued 2002-08-30T11:40:31Z
dc.identifier.citation 0008-3674; CAN GEOTECH J, AUG 2002, vol. 39, no. 4, p.894 to 907. en
dc.identifier.uri http://hdl.handle.net/1993/2799
dc.description.abstract The paper proposes a new elastic-plastic framework for unsaturated, high-plasticity, clayey soils and sand-clay mixtures. The framework considers possible coupling of stress- and suction-induced hardening, leading to a yield surface that is closed or "capped" as suctions increase. This produces a stress state boundary surface in three-dimensional p-q-s stress space (where p is the net mean stress, q is the deviator stress, and s is the matric suction) which differs from that of other conceptual models of its kind. Yielding, a hardening law, and failure criteria for saturated soils are incorporated into the stress state boundary surface. Two parameters, equivalent pressure p(e) and stress ratio eta(s), are introduced to form the basis of the proposed elastic-plastic framework for highly plastic soils with high suctions. This provides an alternative for the stress variables net mean stress and matric suction that are commonly used in modeling unsaturated soils with lower plasticity and lower suctions. This framework has allowed results of experiments on an unsaturated sand-bentonite mixture to be successfully described using elastoplasticity. Yield and failure envelopes associated with the proposed state boundary surface in p-q-s space can be normalized using p(e) and eta(s) in such a way that they agree with a comparable envelope for saturated specimens. en
dc.format.extent 637440 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.rights No part of the NRC Research Press electronic journals may be reproduced, stored, or transmitted in any form or by any means, without the written permission of the publisher, except as stated below. Under the Canadian Copyright Act, individuals may download or print single copies of articles for personal research or study. Any person may reproduce short excerpts from articles in the journals for any purpose that respects the moral rights of authors, provided that the source is fully acknowledged. As a courtesy, the consent of authors of such material should be obtained directly from the author. Authorization to reproduce items for other than personal research or study, as stated above, may be obtained via Access © upon payment of the copyright fee of $10.00 per copy. NRC Research Press also extends certain additional rights to authors. The above rights do not extend to copying or reproduction for general distribution, for advertising or promotional purposes, for creating new collective works, or for resale. For such copying or reproduction, arrangements must be made with NRC Research Press. en
dc.subject constitutive relationships en
dc.subject unsaturation en
dc.subject laboratory tests en
dc.subject expansive soils en
dc.subject clays en
dc.subject shear strength en
dc.subject TEMPERATURE en
dc.subject BEHAVIOR en
dc.title Influence of suction on the strength and stiffness of compacted sand-bentonite en
dc.status yes en
dc.identifier.doi http://dx.doi.org/10.1139/t02-056


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