EVALUATION OF THE INFLUENCE OF ELASTO-VISCOPLASTIC SCALING FUNCTIONS ON MODELLING TIME-DEPENDENT BEHAVIOUR OF NATURAL CLAYS

SOILS AND FOUNDATIONS

ZHEN-YU YIN²  PIERRE-YVES HICHER³  MINNA KARSTUNEN¹ 

[1] Department of Civil Engineering, University of Strathclyde;Department of Civil Engineering, Shanghai Jiaotong University;Research Institute in Civil and Mechanical Engineering

关键词: anisotropy;    clay;    constitutive equation of soil;    creep;    sensitivity;    time effect;    (IGC: A1/D6/E13);   

DOI  :  10.3208/sandf.50.203

学科分类：建筑学

来源: Japanese Geotechnical Society / Jiban Kogakkai

【 摘 要 】

References(35)Cited-By(9)In this paper, we study the influence of the scaling functions in Perzyna's type elasto-viscoplastic models for predicting time-dependent behaviour of natural clays. The constitutive models were developed based on the overstress theory with different scaling functions and on the elastoplastic model S-CLAY1S which accounts for induced anisotropy and gradual degradation of apparent soil bonds. Laboratory tests were simulated on natural clays under one-dimensional and triaxial conditions to evaluate the scaling function influence in the modelling of the strain-rate effect on soil strength and creep effect. The influence of scaling functions on modelling the time-dependent behaviour under pressuremeter condition was also numerically examined. This test is treated as an example of a boundary value problem, which also allows us to see if this in situ testing is capable of deriving the parameters controlling the time-dependent behaviour.

【 授权许可】

Unknown