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Analysis of liquefaction susceptibility of nearly saturated sands
Author(s) -
JafariMehrabadi Ahmad,
Abedinzadegan Abdi Majid,
Popescu Radu
Publication year - 2006
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.555
Subject(s) - constitutive equation , liquefaction , saturation (graph theory) , geotechnical engineering , compressibility , soil water , soil liquefaction , plasticity , finite element method , geology , dissolution , mechanics , engineering , mathematics , thermodynamics , physics , soil science , structural engineering , combinatorics , chemical engineering
Abstract A new constitutive formulation for simulating the behaviour of nearly saturated sands under seismic loads is presented. The formulation is based on combining the Henry's law for dissolution of gas in water, the ideal or perfect gas law and the law of conservation of mass. The effects of transient air dissolution in water on the compressibility of partially saturated soils are also taken into account. The model was calibrated based on numerical simulations of isotropically consolidated cyclic triaxial tests conducted on partially saturated samples of Toyoura sand. A multi‐yield plasticity soil constitutive model implemented in the finite element code DYNAFLOW was used for these numerical simulations. It is shown that the formulation proposed here is able to reasonably predict the soil cyclic undrained behaviour at various degrees of saturation (95% and higher). Copyright © 2006 John Wiley & Sons, Ltd.