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Effect of direction of principal stress on cyclic behavior of dense sands

Jafarzadeh, F ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1061/9780784413272.128
  3. Abstract:
  4. Soils have an anisotropic response, and changing the inclination and magnitude of the major principal stress will affect the collapse potential and brittleness and the shear strength and shear stiffness. A series of undrained cyclic tests on dense Babolsar and Toyoura sands with induced anisotropy were conducted using automatic hollow cylinder apparatus. Special attention was paid to the significant role of the principal stress direction (α). Results show that changes in α has significant effect on the type and the quantity of strains that directly affect the excess pore water pressure generation. Changes in α would change the deformation mode and soil stiffness. Stiffness reduction has led lower transient pore water pressure and higher residual pore water pressure in sands. It was shown that the Booker et al. model is applicable for predicting the pore pressure generation of dense soils. Results reveal that principal stress direction had no effect on internal friction angel at steady state or phase transformation in dense sands
  5. Keywords:
  6. Anisotropy ; Fracture mechanics ; Pore pressure ; Pressure distribution ; Soils ; Stiffness ; Sustainable development ; Anisotropic response ; Collapse potential ; Excess pore water pressure ; Hollow cylinder apparatus ; Major principal stress ; Pore-pressure generation ; Pore-water pressures ; Stiffness reduction ; Shear strength
  7. Source: Geotechnical Special Publication ; 2014 , pp. 1317-1326 ; ISSN: 08950563 ; ISBN: 9780784413272
  8. URL: http://ascelibrary.org/doi/abs/10.1061/9780784413272.128