Stress-dependent behavior of saturated clay
Name
Abdulhadi et al. (Can. Geot. J.)-2012.pdf
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1.67 MB
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Author(s)
Abdulhadi, Naeem O.
Germaine, John T.
Whittle, Andrew
Date Issued
July 2012
Journal
Canadian Geotechnical Journal
Publisher
Canadian Science Publishing
Citation
Abdulhadi, Naeem O., John T. Germaine, and Andrew J. Whittle. “Stress-Dependent Behavior of Saturated Clay.” Can. Geotech. J. 49, no. 8 (August 2012): 907–916.
Version
Author's final manuscript
Abstract
A program of K[subscript 0]-consolidated undrained triaxial compression tests has been performed to investigate the effects of consolidation stress level on the compression and shear behavior of resedimented Boston blue clay (RBBC). Specimens were consolidated to maximum vertical effective stresses in the range 0.15–10 MPa and tested at three overconsolidation ratios (OCR): 1, 2, and 4. The results show that the virgin compression curves are essentially linear in e–log σ[' over v] space over the consolidation stress range. However, the normally consolidated K[subscript 0] stress ratio increases with the level of consolidation stress. The stress–strain–strength properties measured in undrained shear are significantly affected by the consolidation stress level at each OCR and show indications of non-normalizable behavior. At high pressures, the undrained shear stress–strain behavior becomes more ductile, requiring larger strains to mobilize peak resistance and exhibiting less post-peak strain-softening. The undrained strength ratio (s[subscript u]/σ[' over vc]) is not uniquely controlled by OCR as suggested by the SHANSEP equation, but consistently decreases with increasing consolidation effective stress. There is notable reduction in the stiffness ratio (E[subscript u]/σ[' over vc]) with stress level, and significant decrease in the large-strain friction angle.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1139/T2012-057
