Modeling time-dependent behavior of soft sensitive clay

Zhen-Yu Yin, Minna Karstunen, Ching S. Chang, Mirva Koskinen, Matti Lojander

Research output: Contribution to journalArticle

143 Citations (Scopus)

Abstract

The paper focuses on investigating the destructuration process during time-dependent stress-strain evolution. For this purpose, various oedometer tests and triaxial tests on intact and reconstituted samples of soft sensitive Vanttila clay were carried out. Based on experimental observations, a new elastic viscoplastic model, extended from the overstress theory of Perzyna, is developed. The proposed model accounts for inherent and induced anisotropy, interparticle bonds and bond degradation, and viscosity. The determination of model parameters is discussed, demonstrating how all model parameters can be determined in a straightforward way and no additional test is needed for the proposed model compared to the modified Cam clay model. The model is implemented into a finite-element code, which enables coupled consolidation analyses. The model is used to simulate various strain-rate and creep tests under one-dimensional and triaxial conditions on the intact samples of Vanttila clay. The comparisons between experimental results and simulations show that the model has good predictive ability on the time-dependent behavior of a soft sensitive clay.

LanguageEnglish
Pages1103-1113
Number of pages11
JournalJournal of geotechnical and geoenvironmental engineering
Volume137
Issue number11
DOIs
Publication statusPublished - Nov 2011

Fingerprint

time dependent behavior
Clay
clay
modeling
Cam-clay model
oedometer test
triaxial test
Cams
strain rate
creep
consolidation
Consolidation
anisotropy
viscosity
Strain rate
Creep
Anisotropy
Viscosity
Degradation

Keywords

  • creep
  • clays
  • time dependant
  • anisotropy
  • viscoplasticity

Cite this

Yin, Zhen-Yu ; Karstunen, Minna ; Chang, Ching S. ; Koskinen, Mirva ; Lojander, Matti. / Modeling time-dependent behavior of soft sensitive clay. In: Journal of geotechnical and geoenvironmental engineering. 2011 ; Vol. 137, No. 11. pp. 1103-1113.
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Modeling time-dependent behavior of soft sensitive clay. / Yin, Zhen-Yu; Karstunen, Minna; Chang, Ching S.; Koskinen, Mirva; Lojander, Matti.

In: Journal of geotechnical and geoenvironmental engineering, Vol. 137, No. 11, 11.2011, p. 1103-1113.

Research output: Contribution to journalArticle

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