Degradation of Stiffness of Cemented Calcareous Soil in Cyclic Triaxial Tests
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VIEW THE ORIGINAL ARTICLEPublication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 129, Issue 7
Abstract
The deformation characteristics of artificially cemented calcareous soil subjected to undrained cyclic triaxial loading are investigated at different confining pressure and cyclic stress levels. The influence of cementation on the shear stiffness is investigated by comparing the behavior of cemented and uncemented soils with similar initial conditions. It is observed that the deviator stress and the deviatoric strain at yield reduced with increasing number of cycles for cemented sand due to progressive degradation of bond, which results in significant decrease in stiffness. On the other hand, a strain-hardening effect is observed in uncemented sand and this results in increasing yield stress and strain with progressive number of cycles. A linear relationship between degradation index and number of cycles is observed for cemented sand. This relationship has been synthesized in the form of an empirical equation by modifying a previously proposed equation for cohesive soils. This empirical equation was further used to evaluate the fatigue life of soils by adopting a failure criterion.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 129 • Issue 7 • July 2003
Pages: 619 - 629
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Jan 31, 2002
Accepted: Oct 2, 2002
Published online: Jun 13, 2003
Published in print: Jul 2003
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