Elastoplastic Deformation Characteristics of Gravelly Soils
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VIEW THE REPLYPublication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 139, Issue 6
Abstract
This study explores the elastoplastic deformational behavior of gravelly soils. A series of drained triaxial tests with controlled stress paths [conventional triaxial compression (CTC) and conventional triaxial extension (CTE)] were conducted using large specimens composed of gravelly soils. Experimental results reveal that the elastic and plastic deformation of gravelly soils exhibits the following characteristics: (1) the elastic shear modulus stiffens under increase of hydrostatic loading; (2) during the CTC tests, plastic deformation occurs before the failure state, and the influence of confining pressure on the plastic strain is insignificant; (3) through the CTE path, the shear strain dominates the plastic deformation; (4) based on the distribution of plastic flows, the gravelly soils follow the nonassociated flow rule; and (5) this study proposes a possible geometry of plastic potential surface for gravelly soil, which includes two parts: an approximately horizontal line and an elliptic surface in the plane.
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Acknowledgments
This research is supported by the National Science Council of Taiwan, Grant no. 98-2221-E-390-028-MY2. The writers are grateful to the three reviewers who kindly provided professional suggestions of this work.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 139 • Issue 6 • June 2013
Pages: 947 - 955
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Sep 25, 2011
Accepted: Aug 31, 2012
Published online: Sep 4, 2012
Published in print: Jun 1, 2013
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