Mechanism of liquefaction response in sand-silt dynamic centrifuge tests

Mourad Zeghal, Ahmed W. Elgamal, Xiangwu Zeng, Kandiah Arulmoli

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

The process of dynamically induced liquefaction in two centrifuge soil models is analyzed. These models consist of saturated medium-dense sand overlain by a low permeability silt deposit, and represent prototypes of a level site and an embankment. The recorded lateral accelerations are employed to evaluate shear stress and strain histories at different elevations within the tested soil systems. These histories shed light on the involved liquefaction process, and the associated mechanisms of: (1) lateral deformation; (2) stiffness and strength degradation; and (3) possible densification and regain of stiffness, thereafter. The identified response patterns are found comparable to those documented by laboratory cyclic-loading tests.

Original languageEnglish
Pages (from-to)71-85
Number of pages15
JournalSoil Dynamics and Earthquake Engineering
Volume18
Issue number1
DOIs
StatePublished - Jan 1999

Keywords

  • Centrifuge testing
  • Earthquake engineering
  • Liquefaction
  • Sand
  • Soil dynamics
  • System identification

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