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AUS: Anisotropic undrained shear strength model for clays
Author(s) -
Krabbenhøft Kristian,
GalindoTorres Sergio Andres,
Zhang Xue,
Krabbenhøft Jørgen
Publication year - 2019
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.2990
Subject(s) - geotechnical engineering , anisotropy , simple shear , hardening (computing) , von mises yield criterion , triaxial shear test , plasticity , shear (geology) , geology , materials science , mechanics , structural engineering , finite element method , engineering , composite material , physics , layer (electronics) , quantum mechanics
Summary A total stress model applicable to clays under undrained conditions is presented. The model involves three strength parameters: the undrained shear strengths in triaxial compression, triaxial extension, and simple shear. The amount of physical anisotropy implied by the model is a function of the relative magnitude of these three strengths assuming a Mises‐type plastic potential. Elastoplastic deformation characteristics below failure are accounted for by a hardening law requiring two additional parameters that can be related to the axial strains halfway to failure in triaxial compression and extension. Finally, elasticity is accounted for by Hooke law. The result is a relatively simple model whose parameters can all be inferred directly from a combination of in situ and standard undrained laboratory tests. The model is applied to a problem involving the horizontal loading of a monopile foundation for which full scale tests have been previously conducted. The model shows good agreement with the measured data.