Physical modeling and visualization of soil liquefaction under high confining stress

Lenart González, Tarek Abdoun, Mourad Zeghal, Vivian Kallou, Michael K. Sharp

    Research output: Contribution to journalArticle

    Abstract

    The mechanisms of seismically-induced liquefaction of granular soils under high confining stresses are still not fully understood. Evaluation of these mechanisms is generally based on extrapolation of observed behavior at shallow depths. Three centrifuge model tests were conducted at RPI's experimental facility to investigate the effects of confining stresses on the dynamic response of a deep horizontal deposit of saturated sand. Liquefaction was observed at high confining stresses in each of the tests. A system identification procedure was used to estimate the associated shear strain and stress time histories. These histories revealed a response marked by shear strength degradation and dilative patterns. The recorded accelerations and pore pressures were employed to generate visual animations of the models. These visualizations revealed a liquefaction front traveling downward and leading to large shear strains and isolation of upper soil layers.

    Original languageEnglish (US)
    Article number1671-3664(2005)01-0047-11
    Pages (from-to)47-57
    Number of pages11
    JournalEarthquake Engineering and Engineering Vibration
    Volume4
    Issue number1
    DOIs
    StatePublished - Jan 1 2005

    Fingerprint

    Soil liquefaction
    Liquefaction
    liquefaction
    visualization
    Visualization
    Shear strain
    shear strain
    modeling
    Soils
    soil
    Pore pressure
    Centrifuges
    centrifuge
    history
    dynamic response
    Animation
    Extrapolation
    Shear strength
    model test
    pore pressure

    Keywords

    • Centrifuge modeling
    • High confining stress
    • Liquefaction
    • System identification
    • Visualization

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Building and Construction
    • Geotechnical Engineering and Engineering Geology
    • Mechanical Engineering

    Cite this

    Physical modeling and visualization of soil liquefaction under high confining stress. / González, Lenart; Abdoun, Tarek; Zeghal, Mourad; Kallou, Vivian; Sharp, Michael K.

    In: Earthquake Engineering and Engineering Vibration, Vol. 4, No. 1, 1671-3664(2005)01-0047-11, 01.01.2005, p. 47-57.

    Research output: Contribution to journalArticle

    González, Lenart ; Abdoun, Tarek ; Zeghal, Mourad ; Kallou, Vivian ; Sharp, Michael K. / Physical modeling and visualization of soil liquefaction under high confining stress. In: Earthquake Engineering and Engineering Vibration. 2005 ; Vol. 4, No. 1. pp. 47-57.
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