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1 Studia Geotechnica et Mechanica

1 2005

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Dependence of dynamic moduli on the mean stress and void ratio in the light of experimental data

Jeske T., Lefik M.

Studia Geotechnica et Mechanica

2005

Vol. 27, nr 1-2

91-100

The dependence of dynamic shear and bulk moduli on void ratio and mean effective stress is analysed. After a short discussion, a form of functional dependence proposed by Stoll has been chosen as the most promising. Using experimental data for three kinds of the Monterey sand and the Warsaw Pliocene clay (taken from literature) the regression and multiregression analyses have been carried out in order to identify the value of material constants appearing in the expressions discussed. The analysis has firmly confirmed (high correlations and very good values of other statistics) that the general relationship proposed by Stoll has a character of a physical law. The exponent n in this general model is relatively nonsensitive to a kind of soil, but the parameter related to the void ratio is strongly dependent on it. Both these parameters are different for bulk and shear moduli. Some other conclusions concerning the nature of this dependence have been also formulated.