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Modeling strain - rate dependent behavior of KR0 - consolidated soft clays / Li-Zhong Wang in Journal of engineering mechanics, Vol. 138 N° 7 (Juillet 2012) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 138 N° 7 (Juillet 2012) . - pp.738–748 Titre : Modeling strain - rate dependent behavior of KR0 - consolidated soft clays Type de document : texte imprimé Auteurs : Li-Zhong Wang, Auteur ; Han-Bo Dan, Auteur ; Ling-Ling Li, Auteur Année de publication : 2012 Article en page(s) : pp.738–748 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Soft  clays  Elastic  viscoplasticity  Anisotropy  Strain-rate  dependency  Preconsolidation  pressure  Undrained  shear  strength Résumé : An anisotropic elastic-viscoplastic constitutive model is developed for K0-consolidated soft clays in general stress space. Two surfaces are assumed to exist for any loading stress as the loading surface and the reference surface. The scalar multiplier is established by the viscoplastic volumetric strain rate under a one-dimensional straining condition. This model can adequately simulate the stress–strain behavior of undrained triaxial constant strain rate shear tests and undrained creep tests for K0-consolidated clays. The strain-rate dependencies of preconsolidation pressure and undrained shear strength are investigated in analytical formulations, and the similarities and differences of their corresponding strain-rate parameters are examined. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000371 [article] Modeling strain - rate dependent behavior of KR0 - consolidated soft clays [texte imprimé] / Li-Zhong Wang, Auteur ; Han-Bo Dan, Auteur ; Ling-Ling Li, Auteur . - 2012 . - pp.738–748. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 138 N° 7 (Juillet 2012) . - pp.738–748 Mots-clés : Soft  clays  Elastic  viscoplasticity  Anisotropy  Strain-rate  dependency  Preconsolidation  pressure  Undrained  shear  strength Résumé : An anisotropic elastic-viscoplastic constitutive model is developed for K0-consolidated soft clays in general stress space. Two surfaces are assumed to exist for any loading stress as the loading surface and the reference surface. The scalar multiplier is established by the viscoplastic volumetric strain rate under a one-dimensional straining condition. This model can adequately simulate the stress–strain behavior of undrained triaxial constant strain rate shear tests and undrained creep tests for K0-consolidated clays. The strain-rate dependencies of preconsolidation pressure and undrained shear strength are investigated in analytical formulations, and the similarities and differences of their corresponding strain-rate parameters are examined. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000371