Correlation Between Go and \Gtmax for Kaolinite Clay

The low-amplitude shear modulus, Go, of cohesive soils is needed for evaluation of dynamic response of soil masses or foundation systems. Previous studies have shown that there may be a correlation between Go and the static shearing strength, \Gtmax, but the importance of the variables involved is n...

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Bibliographic Details
Published in:Journal of geotechnical engineering 1983-05, Vol.109 (5), p.719-723
Main Authors: Athanasopoulos, G A, Richart, F E
Format: Article
Language:English
Online Access:Get full text
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Summary:The low-amplitude shear modulus, Go, of cohesive soils is needed for evaluation of dynamic response of soil masses or foundation systems. Previous studies have shown that there may be a correlation between Go and the static shearing strength, \Gtmax, but the importance of the variables involved is not clear. An experimental program to evaluate the influence of average confining pressure, \Gsodo, and overconsolidation ratio, OCR, on a kaolinite clay is described. Vac-Aire extruded samples of this clay were subjected to resonant column tests to determine Go, and consolidated-undrained triaxial tests determined \Gtmax, under similar confining conditions and strain rates. Results of this investigation showed that ratio Go/\Gtmax is not a constant value even for a single clay soil. A significant effect is produced by variations in \Gsoo and OCR which can produce errors of #+ 50%. Therefore, use of \Gtmax to estimate Go is a crude procedure at best.
ISSN:0733-9410