Shaking Table Dynamic Tests Of A
Granular Deposit
Author(s)
J. Estaire & V. Cuéllar
Abstract
CEDEX has a six degrees of freedom seismic simulator formed by 3 m long
square table, able to move 10 t mass with up to 1-g accelerations. On that
simulator a rigid box was placed and filled with some 6 t of Hostun RF sand to
study the free field response of a granular deposit subjected to dynamic loading.
During the filling of the box, some accelerometers were installed inside the sand
to measure accelerations suffered by the granular deposit, and two displacement
transducers were placed on the deposit surface. With this equipment, ten tests
were conducted in which the sand deposit, with different initial relative densities,
was subjected to sinusoidal dynamic loadings, in terms of accelerations, with
different amplitudes imposed at the bottom of the box. During those free field
tests, accelerations inside the sand and horizontal and vertical movements on the
top surface of the granular deposit were measured. The results deduced from the
signals recorded by the different accelerometers and from the measurements of
vertical and horizontal movements of the sand surface are discussed and
compared to real cases and values deduced from theories published in the
literature.
Keywords: shaking table, free field, frictional soil, amplification, densification.
1 Introduction and objectives
The tests performed with the box full of sand had as main objective to know the
characteristics of the dynamic behaviour of a sand deposit in free field
conditions, when only subjected to the forces induced by its own weight and by
the horizontal acceleration imposed at its base.
Keywords
shaking table, free field, frictional soil, amplification, densification.
Related Book
Other papers in this volume
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