Abstract
Shaking table tests in a centrifuge have been carried out for dry and saturated deposits of the Toyoura sand which were prepared in laminar container, 74cm long, 34cm wide, and 50cm deep. Model deposits were saturated with either water or silicon oil, and then subjected to sinusoidal input shaking under centrifuge accelerations. Shear moduli and damping ratios were calculated using back analysis for the results of dry and saturated sand model tests. Consequently, it has been found that the shear moduli and the damping ratios of the sand in saturated state is 1.5 times large as same as those of it in dry at the same confining pressure; and dynamic centrifuge model test results of saturated sand can be simulated with a good level of precision on the basis of the shear moduli and damping ratios determined by back analysis.
