Liquefaction phenomena in fluid‐saturated soil based on the Theory of Porous Media and the framework of elasto‐plasticity

Ehlers, Wolfgang; Schenke, Maik; Markert, Bernd

doi:10.1002/zamm.201200220

Cited by 3 publications

(3 citation statements)

References 24 publications

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“…Therein, the soil is described as a biphasic material consisting of an incompressible solid skeleton, composed of the soil grains, and of an incompressible pore fluid (cf. [1] for details). However, as the present contribution merely focuses on the parametric study of the far-field treatment, the solid-skeleton description of [1] is simplified, from an elasto-plastic, to a purely elastic material.…”

Section: Introductionmentioning

confidence: 99%

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On the simulation of soils under rapid cyclic loading conditions

Schenke

Markert

Ehlers

2014

Proc Appl Math and Mech

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When simulating soils, which are subjected to dynamic loadings conditions, base on a convenient soil model, special attention has to be paid to the approximation of the real problem by a suitable initial-boundary-value problem (IBVP). In this regard, the semi-infinite half-space is split into a near-field, which is, in general, the domain of interest, and a far-field. However, truncating the half-space at the near field, which is often sufficient in quasi-static simulations, introduces artificial boundaries at which, in dynamic analysis, the incident waves are reflected back into the domain of interest.Several methods have been proposed in the literature to overcome this problem. The present contribution proceeds from a coupling approach, where the near and the far field are discretised with finite and infinite elements, respectively, and where additionally an energy-absorbing layer is introduced at the interface. The aim of the present contribution is to perform a parametric study associated with a biphasic soil model based on the Theory of Porous Media (TPM). Therein, numerical simulations are carried out in order to judge the energy-absorbing capabilities of the present far-field treatment under different parametric conditions.

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Section: Introductionmentioning

confidence: 99%

“…[1] for details). However, as the present contribution merely focuses on the parametric study of the far-field treatment, the solid-skeleton description of [1] is simplified, from an elasto-plastic, to a purely elastic material.…”

Section: Introductionmentioning

confidence: 99%

On the simulation of soils under rapid cyclic loading conditions

Schenke

Markert

Ehlers

2014

Proc Appl Math and Mech

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“…Therein, the gradual pore-pressure build-up is caused by the contractant properties of a soil under pure shear deformations [1,3]. A suitable soil model, which is based on the TPM including an elastoplastic solid material description, is given in [2] and references therein.…”

Section: Introductionmentioning

confidence: 99%

Liquefaction in fluid‐saturated soils

Schenke

Markert

Ehlers

2013

Proc Appl Math and Mech

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Liquefaction phenomena can be observed if fluid-saturated soils are subjected to transient loading conditions, as they arise, for instance, during earthquakes. The term "liquefaction" comprises more specific liquefaction phenomena, such as flow liquefaction, which is an instability phenomenon in loose soils, and cyclic mobility, which is associated with medium-dense to dense soils, where, in contrast to flow liquefaction, the overall stability of the granular assembly is maintained. However, soil liquefaction is always associated with a pore-pressure build-up, which consequently reduces the intergranular frictional forces, and thus, the load bearing capacity of the fluid-saturated soil. In order to model these particular liquefaction phenomena, we proceed from a continuum-mechanical framework based on the Theory of Porous Media (TPM), where the solid skeleton is described as an elasto-(visco)plastic material with isotropic hardening and a stress-dependent failure surface. The numerical solution of the resulting coupled system of partial differential equations is carried out by the finite-element method (FEM).

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Dynamic properties of sand with different contents of clay

Bao,

Shen

et al. 2024

Powder Technology

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Liquefaction phenomena in fluid‐saturated soil based on the Theory of Porous Media and the framework of elasto‐plasticity

Cited by 3 publications

References 24 publications

On the simulation of soils under rapid cyclic loading conditions

On the simulation of soils under rapid cyclic loading conditions

Liquefaction in fluid‐saturated soils

Dynamic properties of sand with different contents of clay

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