Double-yield-surface model. Ii: Implementation and verification

R. I. Borja, H. S. Hsieh, E. Kavazanjian

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


A double-yield-surface constitutive model for the stress-strain-time behavior of cohesive soils is implemented into a nonlinear finite element program based on Biot’s three-dimensional consolidation theory. The coupled soil deformation-fluid flow model allows creep effects to be modeled concurrently. The soil’s hydraulic conductivity is considered a state variable, which varies with the void ratio so that it decreases as the soil compacts. Parametric, laboratory, and field-case studies are performed on various cohesive soils such as Weald clay, undisturbed bay mud, and Boston blue clay to validate the model. Numerical simulations include drained, undrained, consolidation, creep, stress-relaxation, and combined stress-relaxation and creep tests under triaxial and plane-strain stress conditions. The constitutive model is shown to predict the stress-strain-time behavior of “wet” clays more accurately than did an earlier version based on a singleyield-surface criterion.

Original languageEnglish (US)
Pages (from-to)1402-1421
Number of pages20
JournalJournal of Geotechnical Engineering
Issue number9
StatePublished - Sep 1990
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)


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