Liquefaction assessment of silty sands: Experimental characterization and numerical calibration

The main goal of this paper is to assess the reliability of a nonlinear hysteretic model to capture the behavior of saturated silty sand mixtures under cyclic loading conditions. The parameters governing the liquefaction triggering are identified using the results of standard laboratory tests (monot...

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Bibliographic Details
Published in:Soil dynamics and earthquake engineering (1984) 2022-08, Vol.159, p.107349, Article 107349
Main Authors: Gobbi, Stefania, Santisi d’Avila, Maria Paola, Lenti, Luca, Semblat, Jean-François, Reiffsteck, Philippe
Format: Article
Language:English
Subjects:
3D Iwan Iai constitutive model
Calibration
Constitutive models
Cyclic liquefaction
Cyclic loads
Cyclic mobility
Cyclic triaxial test
Engineering Sciences
Laboratory tests
Liquefaction
Mathematical models
Parameter identification
Reliability analysis
Sand
Silty sand mixtures
Specific gravity
Triaxial tests
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Summary:The main goal of this paper is to assess the reliability of a nonlinear hysteretic model to capture the behavior of saturated silty sand mixtures under cyclic loading conditions. The parameters governing the liquefaction triggering are identified using the results of standard laboratory tests (monotonic and cyclic consolidated undrained triaxial tests as well as resonant column tests) undertaken for reconstituted soil samples. Consequently, the uncertainty related with collected samples is reduced. The numerical results, obtained after calibration of the constitutive model, are in good agreement with the experimental ones and they are analyzed through the effects of relative density, fine content, and confining pressure in the liquefaction resistance of silty sands. •Validation of the 3D Iwan-Iai hysteretic constitutive model under cyclic loading conditions.•Suitability of the 3D Iwan-Iai model for various silty sand mixtures.•Onset of liquefaction simulated for cyclic mobility and cyclic liquefaction.•Effect of fine content and relative density for liquefaction assessment.•Impact of the ‘p2’ liquefaction parameter (Iai model) on the excess pore water pressure build-up.
ISSN:0267-7261
1879-341X
DOI:10.1016/j.soildyn.2022.107349