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Validation of the Energy Method to Determine the Liquefaction
Potential of a Soil Deposit by the Centrifuge
Primary Researchers:
J.
Ludwig Figueroa
Department
of Civil Engineering
Case
Western Reserve University, Cleveland,
OH 44106, USA
E-mail: jlf@po.cwru.edu,
Tel. (216) 368-6247
Adel
S. Saada
Department
of Civil Engineering
Case
Western Reserve University, Cleveland,
OH 44106, USA
E-mail: axs31@po.cwru.edu,Tel.
(216) 368-2427
Slides
from H. Dief's Seminar November 1998
Abstract:
The development of pore pressure leading to liquefaction
of soils subjected to shock or earthquake loadings has been associated
to the amount energy imparted to the soil during dynamic motion. Extensive
laboratory work conducted at CWRU indicated that regardless of the rate
and mode of stress application, sinusoidal or random, the unit energy needed
to initiate liquefaction is nearly constant for a given effective confining
stress and a specific relative density. This work also demonstrated that
the unit energy imparted to the soil to induce liquefaction is independent
of the shear strain amplitude. Data obtained during torsional shear tests
made possible the development of relationships between the unit energy
required for liquefaction (as the dependent variable) and the effective
confining pressure and the relative density (as independent variables).
However, additional research is needed to build up on these studies and
complete the validation of the energy method primarily with centrifuge
tests, as well as with any existing field data. This will lead to its full
implementation in determining the liquefaction potential of a soil deposit
in engineering practice.
CWRU Department of Civil Engineering
Communication
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