30% fine content and materials with < 15%
fine content. The results clearly indicate the need for modification in previously proposed G=Gmax ????
curves, particularly for gravels with > 30% fine content. Also, the suggested D ????
curves lay out of
the bounds of data reported by previous researchers, which may be due to the effects of testing frequency,
fine content, and confining pressure. In addition, a predictive hyperbolic model for estimating normalized
shear modulus (G=Gmax) versus shear strain (
) is presented. Effects of the number of cyclic loadings
over the shear modulus and damping ratio are also investigated.]]>
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