Influence of particle size distribution on the dynamic properties of non-cohesive soils under small deformations
DOI:
https://doi.org/10.21703/0718-2813.2008.3.3693Keywords:
damping, resonant column, angular deformation, particle size distribution, shear modulusAbstract
The high complexity and cost of measuring dynamic soil parameters lead to the use of empirical formulas for their estimation. Although there is a lack of abundant and systematic information on the influence of particle size distribution on the dynamic properties of soils, some publications demonstrate the inaccuracy of these formulas for certain soil types. This work studies the influence of mean particle diameter on the dynamic properties of non-cohesive soils. The study is based on resonant column tests using eight sands with different mean particle diameters, the same uniformity coefficient, and no fines content. P-waves are measured, and data on the shear modulus, damping, and modulus of elasticity are obtained. A range for mean particle diameter is thus found where the maximum shear modulus (Gmax) and the modulus of elasticity (Es,max) are independent of the particle diameter. Likewise, a range was found for the mean particle diameter where the G/Gmax(γampl) and D(γampl) curves for constant pressure can be described by a single expression. It is thus concluded that the dynamic parameters under study are independent, within a given range, of the mean particle diameter.
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