Abstract: A new field test method to evaluate in situ nonlinear shear modulus of soils was developed. The method utilizes a drilled shaft as a cylindrical, axisymmetric source for shear loading of soil at depth. The applicability ...

Abstract: In situ field testing has been performed over the past several years at a silty sand site in Austin, Tex. using the borehole spectral analysis of surface waves (SASW) tool to develop the technique and assess the validity ...

Abstract: The shear modulus (G) is the parameter commonly used to describe soil stiffness and to calculate shear deformations at small-to-moderate strains (γ<0.5%). The material damping ratio (D) is the parameter commonly used ...