Model prediction of static liquefaction

Influence of the initial state on potential instabilities

Giuseppe Buscarnera*, Andrew J. Whittle

*Corresponding author for this work

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

This paper examines the influence of the initial state of sands on the potential for undrained instability. The main goal is to illustrate how advanced constitutive modeling of sand behavior can be used to evaluate the susceptibility for static liquefaction. The methodology is based on the concept of latent instability, in which the potential for collapse is contingent on particular boundary conditions. A generalized effective stress soil model, MIT-S1, is used to support the analysis and is combined with a theoretical approach for identifying loss of control owing to undrained shear perturbations. The theory is evaluated using experimental evidence available for Toyoura sand to point out the key role of void ratio and consolidation history and to provide experimental validation for the theory. Model predictions are then used to disclose the subtle role of drained preloading paths in promoting liquefaction instabilities. The ability of the constitutive model to reproduce the interplay between undrained kinematic constraints and material failure is fundamental in predicting potential instabilities arising from changes in drainage conditions. The examples shed light on the mechanics of static liquefaction and set a framework for applying the principles of material stability to the triggering analysis of flow slides induced by undrained shear perturbations.

Original languageEnglish (US)
Pages (from-to)420-432
Number of pages13
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume139
Issue number3
DOIs
StatePublished - Jul 5 2013

Fingerprint

Liquefaction
liquefaction
prediction
Sand
sand
perturbation
preloading
void ratio
effective stress
mechanics
consolidation
Constitutive models
boundary condition
kinematics
Consolidation
Drainage
drainage
Mechanics
Kinematics
History

Keywords

  • Constitutive modeling
  • Flow slides
  • Mechanical instability
  • Sands
  • Static liquefaction

ASJC Scopus subject areas

  • Environmental Science(all)
  • Geotechnical Engineering and Engineering Geology

Cite this

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title = "Model prediction of static liquefaction: Influence of the initial state on potential instabilities",
abstract = "This paper examines the influence of the initial state of sands on the potential for undrained instability. The main goal is to illustrate how advanced constitutive modeling of sand behavior can be used to evaluate the susceptibility for static liquefaction. The methodology is based on the concept of latent instability, in which the potential for collapse is contingent on particular boundary conditions. A generalized effective stress soil model, MIT-S1, is used to support the analysis and is combined with a theoretical approach for identifying loss of control owing to undrained shear perturbations. The theory is evaluated using experimental evidence available for Toyoura sand to point out the key role of void ratio and consolidation history and to provide experimental validation for the theory. Model predictions are then used to disclose the subtle role of drained preloading paths in promoting liquefaction instabilities. The ability of the constitutive model to reproduce the interplay between undrained kinematic constraints and material failure is fundamental in predicting potential instabilities arising from changes in drainage conditions. The examples shed light on the mechanics of static liquefaction and set a framework for applying the principles of material stability to the triggering analysis of flow slides induced by undrained shear perturbations.",
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Model prediction of static liquefaction : Influence of the initial state on potential instabilities. / Buscarnera, Giuseppe; Whittle, Andrew J.

In: Journal of Geotechnical and Geoenvironmental Engineering, Vol. 139, No. 3, 05.07.2013, p. 420-432.

Research output: Contribution to journalArticle

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