MODELLING SMALL STRAINS FOR ANALYSIS IN GEOTECHNICAL ENGINEERING

This paper specifies factors which should be considered, when investigating the small strain stiffness of soils in order to obtain a realistic prediction of ground movement. For many structures in overconsolidated soils, most of the soil experiences shear strains less than 0.1%. At these small strains, the stiffness of overconsolidated soil is nonlinear, and depends on the current state, overconsolidation ratio and recent stress history of the soil. To predict both the magnitudes and the distributions of ground movements adequately, soil models should incorporate all these characteristics. This behaviour can be modelled, using a nonlinear elastic relationship derived empirically from appropriate data, but these data can be obtained only by using special stress path testing, which usually requires local axial strain measurement. A new kinematic yield model has been developed, which uses easily obtained basic soil parameters to model the stress-strain behaviour of soil. This approach provides a potentially simpler method of predicting ground movements.

  • Availability:
  • Corporate Authors:

    Thomas Telford Limited

    London,   United Kingdom 
  • Authors:
    • STALLEBRASS, S E
  • Publication Date: 1990-1

Language

  • English

Media Info

  • Pagination: p. 26-29
  • Serial:
    • GROUND ENGINEERING
    • Volume: 23
    • Issue Number: 1
    • Publisher: EMAP CONSTRUCT LIMITED
    • ISSN: 0017-4653

Subject/Index Terms

Filing Info

  • Accession Number: 00606539
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM