A variational approach-based method for simulating the post-liquefaction behaviour of soil masses

This chapter proposes a general numerical scheme aimed at stimulating the evolution of a soil subject to a liquefaction phenomenon, the constitutive behavior of which is described by means of a regularized Bingham model. This procedure is based on the combination of a variational principle for the v...

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Vydáno v:Computational Fluid and Solid Mechanics 2003 s. 1467 - 1470
Hlavní autoři: Montassar, S., de Buhan, P., Dormieux, L., Jellouli, M.
Médium: Kapitola
Jazyk:angličtina
Vydáno: Elsevier Ltd 2003
ISBN:0080440460, 9780080440460
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Abstract This chapter proposes a general numerical scheme aimed at stimulating the evolution of a soil subject to a liquefaction phenomenon, the constitutive behavior of which is described by means of a regularized Bingham model. This procedure is based on the combination of a variational principle for the velocity field and a step-by-step time integration algorithm making it possible to follow the geometry changes. A first illustration of the method implemented in a finite element code is also presented in the chapter. The adoption of a Bingham model instead of a Newton model for describing the behavior of the liquefied soil results in increasing the soil resistance and thus limiting the amplitude of geometry change of liquefied soil spreading. Some hypotheses, such as the prefect bonding assumption between the liquefied soil and the substratum can be investigated and replaced by a more realistic boundary condition allowing for possible slippage beyond a certain shear stress level.
AbstractList This chapter proposes a general numerical scheme aimed at stimulating the evolution of a soil subject to a liquefaction phenomenon, the constitutive behavior of which is described by means of a regularized Bingham model. This procedure is based on the combination of a variational principle for the velocity field and a step-by-step time integration algorithm making it possible to follow the geometry changes. A first illustration of the method implemented in a finite element code is also presented in the chapter. The adoption of a Bingham model instead of a Newton model for describing the behavior of the liquefied soil results in increasing the soil resistance and thus limiting the amplitude of geometry change of liquefied soil spreading. Some hypotheses, such as the prefect bonding assumption between the liquefied soil and the substratum can be investigated and replaced by a more realistic boundary condition allowing for possible slippage beyond a certain shear stress level.
Author de Buhan, P.
Jellouli, M.
Dormieux, L.
Montassar, S.
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Tamate, Towhata (bib4) 1999; 18
Salençon (bib6) 2000
Piau (bib3) 1996; 40
Towhata, Sasaki, Tokida, Matsumoto, Tamari, Yamada (bib2) 1992; 32
Pecker, Prevost, Dormieux (bib1) 2001; 5
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  year: 1998
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  ident: bib5
  article-title: Fluid dynamics based prediction of liquefaction induced lateral spreading
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  year: 2001
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  ident: bib1
  article-title: Analysis of pore pressure generation and dissipation in cohesionless materials during seismic loading
  publication-title: J Earthquake Eng
– volume: 40
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  year: 1996
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  article-title: Flow of a yield stress fluid in a long domain. Application to flow on an inclined plane
  publication-title: J Rheol
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  publication-title: Handbook of Continuum Mechanics
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  article-title: Prediction of permanent displacement of liquefied ground by means of minimum energy principle
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Snippet This chapter proposes a general numerical scheme aimed at stimulating the evolution of a soil subject to a liquefaction phenomenon, the constitutive behavior...
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Title A variational approach-based method for simulating the post-liquefaction behaviour of soil masses
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