Flow Failure of Saturated Sand under Simultaneous Monotonic and Cyclic Stresses
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 126, Issue 2
Abstract
An estimate of the residual strength achieved by saturated Toyoura sand during flow failure is proposed, based on laboratory tests where not only monotonic loading is applied alone, but a simultaneous cyclic stress is also superimposed. This superimposed or complementary cyclic stress represents the minor seismic shaking following strong shaking that is still acting on a liquefied sand driven by the in situ static stress. Hollow cylindrical samples are torsionally sheared under monotonic conditions and axially loaded under cyclic conditions. Field-like stress conditions are reproduced on a 45° plane. The cyclic axial load produces more torsional deformation and reduction of the residual strength. A procedure for the estimate of this reduction is proposed. The empirical formula and test results are validated only for Japanese standard Toyoura sand specimens prepared by moist tamping.
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Information & Authors
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 126 • Issue 2 • February 2000
Pages: 131 - 138
History
Received: Dec 23, 1998
Published online: Feb 1, 2000
Published in print: Feb 2000
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