Results 261 to 270 of about 43,969 (311)

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.
openaire   +1 more source

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
openaire   +1 more source

Unified modeling of flow liquefaction and cyclic mobility

Soil Dynamics and Earthquake Engineering, 2000
Abstract 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
openaire   +2 more sources

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.
openaire   +1 more source

Undrained shear strength for liquefaction flow failure analysis

Canadian Geotechnical Journal, 1995
An important factor in evaluating the stability of hydraulic fills against flow sliding is the undrained steady-state strength mobilized in the field. This paper proposes an empirical relationship between three factors: the undrained strength back-calculated from fills that failed by flow sliding, equivalent clean sand normalized blow-count values, and
J.-M. Konrad, B.D. Watts
openaire   +1 more source

Modeling Delayed Flow Liquefaction Initiation after Cyclic Loading

Geotechnical Earthquake Engineering and Soil Dynamics V, 2018
Ground shaking during earthquakes can be a prominent cause of strength loss in loose saturated soils. In some cases, uncontrolled pore pressure build-up and liquefaction may occur with a time lag with respect to strong ground motion, especially when the time-dependent properties of the soil interact with the constraints brought by undrained and/or ...
Shi Z., Marinelli F., Buscarnera G.
openaire   +2 more sources

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
openaire   +1 more source

Liquefied strength ratio from liquefaction flow failure case histories

Canadian Geotechnical Journal, 2002
The shear strength of liquefied soil, su(LIQ), mobilized during a liquefaction flow failure is normalized with respect to the vertical effective stress (σ 'vo) prior to failure to evaluate the liquefied strength ratio, su(LIQ)/σ 'vo. Liquefied strength ratios mobilized during 33 cases of liquefaction flow failure are estimated using a procedure ...
Scott M Olson, Timothy D Stark
openaire   +1 more source

Unified modeling of soil behaviors before/after flow liquefaction

Computers and Geotechnics, 2018
Abstract Flow liquefaction of soil involves a phase transition process from solid to fluid. A constitutive model that can describe the soil behaviors of both the solid and fluid phases in a unified way was proposed. The constitutive model adopts a phase transition criterion to detect the onset of flow liquefaction and associates an elastoplastic ...
Bin Ye, Xueqian Ni, Yu Huang, Feng Zhang
openaire   +1 more source

Wave-induced liquefaction and flow of subaqueous mud layers

Coastal Engineering, 1998
Abstract In this paper, results of laboratory experiments on wave-induced liquefaction and transport of mud are presented. Wave-induced stresses inside the bed at the onset of liquefaction are shown to be just larger than the yield strength of the bed, which is determined independently with sounding tests.
Thijs van Kessel, C. Kranenburg
openaire   +1 more source