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Reduction of shear modulus at small strains in simple shear

Lanzo, G. ; Vucetic, M. ; Doroudian, M.

Journal of Geotechnical and Geoenvironmental Engineering, Nov, 1997, Vol.123(11), p.1035(8) [Periódico revisado por pares]

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  • Título:
    Reduction of shear modulus at small strains in simple shear
  • Autor: Lanzo, G. ; Vucetic, M. ; Doroudian, M.
  • Assuntos: Shear (Mechanics) -- Analysis ; Sands -- Testing ; Clay -- Testing ; Dynamic Testing (Materials)
  • É parte de: Journal of Geotechnical and Geoenvironmental Engineering, Nov, 1997, Vol.123(11), p.1035(8)
  • Descrição: Cyclic tests were conducted to study the secant shear modulus, [G.sub.s] of two reconstituted sands and three laboratory-made clays at small cyclic shear-strain amplitudes [[Gamma].sub.c] [approximately[ 0.0006%-0.02%. A recently developed direct simple shear device for small-strain testing was employed. The effects of cyclic strain amplitude ([[Gamma].sub.c]), type of soil and plasticity index (PI), vertical effective consolidation stress ([[Sigma][prime].sub.vc]), and overconsolidation ratio (OCR) were investigated. The results show that the ordinates of the normalized shear modulus reduction curve, [G.sub.s]/[G.sub.max] - [[Gamma].sub.c], generally increase as [[Sigma].sub.vc] and OCR increase. However, these effects of [[Sigma][prime].sub.vc] and OCR become smaller and may eventually disappear as the PI of the soil increases.

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