Resonant Column Testing of Sands with Different Viscosity Pore Fluids
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 126, Issue 1
Abstract
The effect of pore fluid viscosity on the stiffness, damping, and liquefaction characteristics of sands was investigated to assess the potential contributions to a centrifuge model seismic response for soils saturated with high-viscosity pore fluid. Resonant column tests with cyclic loading frequencies in the range of 20–45 Hz were performed on a variety of fluids and sand sizes. At a strain level less than 2 × 10−4, the damping increased with pore fluid viscosity and shear strain amplitude, and it decreased with sand particle size. However, at shear strain greater than about 2 × 10−4, the increased skeleton damping tended to mask any effect of additional damping due to fluid viscosity. The liquefaction tests on fine silica sand revealed that the increase in total energy dissipation was not more than 10% for 100 cS oil when compared with water at a driving frequency of 25 Hz. Based on the experimental results, a simple model is proposed to examine the dependency of viscous damping on pore fluid viscosity, loading frequency, particle size, and shear strain amplitude.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 126 • Issue 1 • January 2000
Pages: 10 - 17
History
Received: Nov 11, 1998
Published online: Jan 1, 2000
Published in print: Jan 2000
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