VISCOUS-ELASTIC-PLASTIC MODELLING OF ONE-DIMENSIONAL TIME-DEPENDENT BEHAVIOUR OF CLAYS

Increased attention has recently been directed towards the influence of time and strain-rate effects on the behaviour of clays in one-dimensional (1-D) laboratory consolidation. The improved understanding coming from these studies must now be incorporated into improved constitutive models that can be used for analysis of foundation settlements. This paper presents a 1-D model for stepped loading using a new concept for establishing "equivalent times" during time-dependent straining. This model is then developed into a general constitutive equation for continuous loading. The model uses three parameters, lambda, kappa, and psi, that can be easily found using conventional oedometer tests. The general model has been used to develop analytical solutions for creep tests, relaxation tests, constant rate of strain (CRSN) tests, and tests with constant rate of stress (CRSS). Results from three different clays have been used to examine the validity of the model.

• Corporate Authors:

  National Research Council of Canada

  Research Journals
  Ottawa, Ontario K1A 0R6,   Canada 
• Authors:
  • Yin, J-H
  • Graham, Jim
• Publication Date: 1989-5

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 199-209
• Serial:
  • CANADIAN GEOTECHNICAL JOURNAL
  • Volume: 26
  • Issue Number: 2
  • Publisher: National Research Council of Canada

Subject/Index Terms

• TRT Terms: Clay; Consolidation; Creep; Deformation curve; Elastoplasticity; Mathematical models; Mechanical relaxation; Strain (Mechanics); Time dependence
• Uncontrolled Terms: Elastic plastic analysis; Strain rate
• Old TRIS Terms: One dimensional consolidation
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00485404
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 31 1989 12:00AM