Cyclic tests were conducted to study the secant shear modulus, G\ds, of two reconstituted sands and three laboratory-made clays at small cyclic shear-strain amplitudes γ\dc≈0.0006%–0.02%. A recently developed direct simple shear device for small-strain testing was employed. The effects of cyclic strain amplitude (γ\dc), type of soil and plasticity index (PI), vertical effective consolidation stress (σ’v+c), and overconsolidation ratio (OCR) were investigated. The results show that the ordinates of the normalized shear modulus reduction curve, Gs/Gmax–γ\dc, generally increase as σ’v\dc and OCR increase. However, these effects of σ’v\dc and OCR become smaller and may eventually disappear as the PI of the soil increases.
Reduction of shear modulus at small strains in simple shear / Lanzo, Giuseppe; M., Vucetic; M., Doroudian. - In: JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING. - ISSN 1090-0241. - STAMPA. - 123:11(1997), pp. 1035-1042. [10.1061/(ASCE)1090-0241(1997)123:11(1035)]
Reduction of shear modulus at small strains in simple shear
LANZO, Giuseppe;
1997
Abstract
Cyclic tests were conducted to study the secant shear modulus, G\ds, of two reconstituted sands and three laboratory-made clays at small cyclic shear-strain amplitudes γ\dc≈0.0006%–0.02%. A recently developed direct simple shear device for small-strain testing was employed. The effects of cyclic strain amplitude (γ\dc), type of soil and plasticity index (PI), vertical effective consolidation stress (σ’v+c), and overconsolidation ratio (OCR) were investigated. The results show that the ordinates of the normalized shear modulus reduction curve, Gs/Gmax–γ\dc, generally increase as σ’v\dc and OCR increase. However, these effects of σ’v\dc and OCR become smaller and may eventually disappear as the PI of the soil increases.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
