Analysis of soil liquefaction using centrifuge tests of a site subjected to biaxial shaking

Mourad Zeghal, Omar El-Shafee, Tarek Abdoun

    Research output: Contribution to journalArticle

    Abstract

    This study investigated the dynamic response and liquefaction of level saturated-sand deposits subjected to biaxial shaking using a number of centrifuge tests. Dense and loose sandy soil deposits were built in a 2D laminar container and subjected to a series of biaxial base excitations that approximate in somewhat realistic fashion the conditions of a site subjected to earthquake shaking. A dense array of accelerometers and pore pressure sensors was used to monitor the deposit response. The recorded accelerations and pore pressures were employed along with a non-parametric identification procedure to estimate the corresponding dynamic shear stress-strain histories. In turn, these histories were employed to assess the effects of non-proportional loading on soil contraction and dilation mechanisms. Pore water pressure buildup was found to be affected by load non-proportionality and a direct function of the phase angle of the induced shear stresses. The loose and dense soil deposits had contrasting as well as similar response patterns.

    Original languageEnglish (US)
    Pages (from-to)229-241
    Number of pages13
    JournalSoil Dynamics and Earthquake Engineering
    Volume114
    DOIs
    StatePublished - Nov 1 2018

    Fingerprint

    Soil liquefaction
    centrifuges
    Centrifuges
    centrifuge
    liquefaction
    pore pressure
    shear stress
    Deposits
    accelerometer
    Pore pressure
    dilation
    history
    dynamic response
    Soils
    sandy soil
    contraction
    Shear stress
    porewater
    soil
    testing

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Geotechnical Engineering and Engineering Geology
    • Soil Science

    Cite this

    Analysis of soil liquefaction using centrifuge tests of a site subjected to biaxial shaking. / Zeghal, Mourad; El-Shafee, Omar; Abdoun, Tarek.

    In: Soil Dynamics and Earthquake Engineering, Vol. 114, 01.11.2018, p. 229-241.

    Research output: Contribution to journalArticle

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