AN ELASTO-VISCOPLASTIC MODEL WITH COMBINED HARDENING OF ANISOTROPICALLY CONSOLIDATED COHESIVE SOILS

概要

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A model introduced in the present paper is capable of adequately describing the time-dependent behaviour of anisotropically consolidated cohesive soils. The salient features of the proposed model are summarized as follows : i) Generalized forms of the Cambridge models are given to both yield function and plastic potential. ii) A combination of isotropic and kinematic hardening is used. iii) A non-associative flow rule is proposed. iv) The isotropic hardening is connected to the time history as well as to the viscoplastic strain history. v) The translation of yield surface is specified by extending Ziegler's rule of kinematic hardening. vi) The constitutive model has versatility and flexibility to describe expansion, translation, and rotation of yield surface in the stress space. Several strain controlled undrained triaxial tests of anisotropically consolidated cohesive soils are simulated and the good agreement is observed between simulation and experimental data.
社団法人地盤工学会の論文
1990-06-15