Some recent developments in constitutive modelling of soft clays

M. Karstunen, Z. Y. Yin, M. Koskinen, M. Leoni, P. A. Vermeer

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

6 Citations (Scopus)

Abstract

Natural soft soils are complex geomaterials: they are structured and exhibit viscous behaviour. The structure of natural soils consists of fabric (i.e. the arrangement of soil particles and particles contacts) and apparent bonding. The fabric of soft clays is often anisotropic and the anisotropy changes during plastic deformations. In addition, the constitutive behaviour of soft soils is time-dependent. Firstly, some recent experimental results on soft natural Finnish clays are shown, demonstrating the complexity of material behaviour that constitutive models for soft clays need to capture. The formulations of recently proposed constitutive models that attempt to represent the soil behaviour under general stress states are then presented. The models are relatively simple hierarchical models, which enable model features to be switched on and off dependent on the problem to be solved. Comparisons with experimental data highlight the importance of accounting for anisotropy and its evolution when modelling the viscous behaviour of soft soils.

Original languageEnglish
Title of host publication12th International Conference on Computer Methods and Advances in Geomechanics 2008
Pages966-975
Number of pages10
Publication statusPublished - 1 Dec 2008
Externally publishedYes
Event12th International Conference on Computer Methods and Advances in Geomechanics 2008 - Goa, India
Duration: 1 Oct 20086 Oct 2008

Publication series

Name12th International Conference on Computer Methods and Advances in Geomechanics 2008
Volume2

Conference

Conference12th International Conference on Computer Methods and Advances in Geomechanics 2008
Country/TerritoryIndia
CityGoa
Period1/10/086/10/08

Keywords

  • Anisotropy
  • Constitutive modelling
  • Destructuration
  • Soft clay
  • Viscosity

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Applied Mathematics

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