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Criterion for flow liquefaction instability
Acta Geotechnica, 2013This study describes a general liquefaction flow instability criterion for elastoplastic soils based on the concept of loss of uniqueness. We apply the criterion to the general case of axisymmetric loading and invoke the concepts of effective stresses and loss of controllability to arrive at a general criterion for the onset of liquefaction flow.
José E Andrade +2 more
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Predicting flow liquefaction, a constitutive model approach
Acta Geotechnica, 2017In 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 ...
Manouchehr Latifi
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Unified modeling of flow liquefaction and cyclic mobility
Soil Dynamics and Earthquake Engineering, 2000Abstract Flow liquefaction and cyclic mobility are two different phenomena that are encountered during strong earthquakes. Flow liquefaction is associated with the contractive behavior of loose granular materials and cyclic mobility is associated with the dilative response of both loose and dense granular materials at low confining stresses.
Li, XS, Ming, HY
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Flow Liquefaction Instability as a Mechanism for Lower End of Liquefaction Charts
Journal of Geotechnical and Geoenvironmental Engineering, 2017The state-of-the-practice uses the “simplified procedure” for evaluating liquefaction susceptibility of soils. Based on this procedure, liquefaction charts have been developed that correlate soil resistance to earthquake-induced stresses. These charts are based on case histories of past earthquakes and have proven to be useful while evaluating ...
Mital, Utkarsh +2 more
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Liquefaction of coal in a flowing-solvent reactor
Fuel, 1991Abstract 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 flow slides in large flumes
International Journal of Physical Modelling in Geotechnics, 2019Liquefaction flow slides in sand have been investigated during an extensive experimental research programme during the period 1973–1977 on behalf of the design of the storm surge barrier in the Oosterschelde estuary. The programme included more than a hundred tests in large- and medium-sized flumes on submerged, loosely packed sand bodies.
Maarten B. De Groot +3 more
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Liquefaction and Flow Failure During Seismic Exploration
Journal of Geotechnical Engineering, 1990A 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 +2 more
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Constitutive Modeling of Flow Liquefaction and Cyclic Mobility
Computer Simulation of Earthquake Effects, 2000Flow 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, 1993Two 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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