Results 221 to 230 of about 10,512 (265)

Predicting flow liquefaction, a constitutive model approach

Acta Geotechnica, 2017
In this paper, flow liquefaction criterion for contractive loose sands is analytically extracted based on the fundamental definition of flow liquefaction. In order to obtain the closed form of this criterion, Dafalias–Manzari constitutive model is employed; so the stress ratio at the onset of flow liquefaction is presented as a function of model ...
Alireza Najma, Manouchehr Latifi
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Numerical simulation of ground flow caused by seismic liquefaction

Soil Dynamics and Earthquake Engineering, 1999
Abstract Flow failure of sandy subsoil induced by seismic liquefaction is known to cause significant damage to structures. It is induced not only by the dynamic forces exerted by seismic acceleration but also by the static gravity force in consequence of the topography of the ground. The ground flow may sometimes continue after the end of the seismic
S. Tamate, I. Towhata
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Liquefaction of coal in a flowing-solvent reactor

Fuel, 1991
Abstract A flowing-solvent liquefaction reactor has been used to examine the primary solubilization potential of a range of coals. The reactor configuration allows the suppression of secondary reactions by sweeping the heated zone with a continuous flow of solvent. The design of the system combines low thermal inertia and direct electrical resistance
Jon R. Gibbins, Rafael Kandiyoti
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Liquefaction and Flow Failure During Seismic Exploration

Journal of Geotechnical Engineering, 1990
A case history and analysis of a flow slide due to soil liquefaction is presented. The failure was triggered by vibratory tampers conducting a seismic reflection survey on a roadway embankment in Michigan's Upper Penninsula. Postfailure investigations included a survey of construction records, in situ and laboratory tests, and replication of the input ...
Roman D. Hryciw, Stan Vitton, Thomas G. Thomann   +2 more
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Constitutive Modeling of Flow Liquefaction and Cyclic Mobility

Computer Simulation of Earthquake Effects, 2000
Flow liquefaction is due to contractive response of loose granular soils, while cyclic mobility is related to both contractive and dilative response of granular soils. These two failure mechanisms may occur in a single soil, depending on the density and confining pressure applied.
X. S. Li, H. Y. Ming, Z. Y. Cai
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Liquefaction and flow failure during earthquakes

Géotechnique, 1993
Two aspects of seismically-induced liquefaction are discussed which are of vital engineering significance: the triggering condition and the consequences of liquefaction. The triggering condition is examined with respect to liquefaction analysis, note being taken of the onset condition which is governed by cyclic strength.
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Liquefaction flow slide at horizontal ground

2005
A liquefaction flow slide is an instability in loosely packed saturated sand or silt after liquefaction under monotonic loading. The conditions for such a flow slide are discussed. The relevance of these conditions is illustrated by application to slope failure.
De Groot M.B., Korff M., Pachen H.M.A.
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Liquefaction flow behavior of Guamo sand

2015
In soil mechanics there are many unknowns about the behavior of materials and even more great uncertainty generated sands, due to its gradation and shape of the grains is sometimes difficult to know their behavior and especially when trying to study by tests in laboratory.
Jimenez Jiménez Omar Javier, Lizcano Peláez Arcesio   +1 more
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Parameters describing flow liquefaction of soils

2005
The paper presents the results of comprehensive laboratory test programme carried out on various soils. Monotonic undrained triaxial tests were executed on specimens subjected to isotropic and anisotropic consolidation. Some parameters based on mean effective stress values at specific stages of a test were used for the sake of quantitative analysis of ...
Lipiński M.J., Wolski W.
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Onset Condition for Liquefaction and Consequent Flow

1996
Abstract In the preceding chapters, laboratory testing on reconstituted samples has been recognized as a useful tool for making the most conservative estimate of the residual strength of in situ sands. A similar argument may be developed as to the cyclic strength controlling the triggering of liquefaction. The relationship between the
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