Journal
COMPUTERS AND GEOTECHNICS
Volume 31, Issue 6, Pages 473-489Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2004.07.001
Keywords
shear strength functions; unsaturated granulates; distinct element method; water-retention curve; particle gradation; generalized effective stress
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Based on numerical experiments using the distinct element method, revised with the capillary water contact model proposed, this paper presents an insight into the shear strength functions of unsaturated granulates. The studies indicate that there appears to be a unique peak/residual shear strength envelope if it is described by the generalized effective stress (GES) proposed. The curve of GES due to suction is observed to be analogous to the water-retention curve, and is correlated with the particle gradation. The two shear strength functions proposed appear to be able to reflect both the nonlinear feature and the effect of particle gradation for unsaturated soils. (C) 2004 Elsevier Ltd. All rights reserved.
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