Stiffness degradation and shear strength of silty sands

Jun Hwan Lee, Rodrigo Salgado, J. Antonio H Carraro

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Soils behave nonlinearly from very early loading stages. When granular soils contain a certain amount of fines, the degree of nonlinearity also changes, as stiffness and strength characteristics vary with fines content. Hyperbolic stress-strain models and variations of these models are often used for description of the nonlinear behavior. A modified hyperbolic stress-strain relationship is used in this paper for representing the degradation of the elastic modulus of silty sands. The model is based on two modulus degradation parameters that determine the magnitude and rate of modulus degradation as a function of stress level. Realistic representation of soil behavior using this nonlinear relationship requires estimation of the degradation parameters as a function of silt content and relative density DR. A series of triaxial test results on sands containing different amounts of nonplastic silt were analyzed with this purpose. Relationships between the degradation parameters and cone penetration test (CPT) cone resistance qc are also proposed.

Original languageEnglish
Pages (from-to)831-843
Number of pages13
JournalCanadian Geotechnical Journal
Volume41
Issue number5
DOIs
Publication statusPublished - 2004 Oct 1

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Shear strength
shear strength
stiffness
Sand
Stiffness
Degradation
sand
silt
Silt
stress-strain relationship
cone penetration test
Soils
soil
elastic modulus
triaxial test
Cones
nonlinearity
Elastic moduli
parameter
rate

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

Cite this

Lee, Jun Hwan ; Salgado, Rodrigo ; Carraro, J. Antonio H. / Stiffness degradation and shear strength of silty sands. In: Canadian Geotechnical Journal. 2004 ; Vol. 41, No. 5. pp. 831-843.
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Stiffness degradation and shear strength of silty sands. / Lee, Jun Hwan; Salgado, Rodrigo; Carraro, J. Antonio H.

In: Canadian Geotechnical Journal, Vol. 41, No. 5, 01.10.2004, p. 831-843.

Research output: Contribution to journalArticle

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