Strain-rate dependency of shear strength for a highly overconsolidated clay

Jian Han, Christophe Dano, Pierre Yves Hicher, Zhen Yu Yin

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

2 Citations (Scopus)

Abstract

The paper summarizes the results from undrained triaxial compression tests on Merville clay, a highly over-consolidated clay at Merville in the north of France. The specimens were prepared in four different over-consolidation ratios (OCR=7, 14, 28, 56) and, for each OCR, undrained shear tests were performed using three or four axial strain rates varying from 0.26 %/h to 25.89 %/h. The strain-rate dependency of the undrained stress level q/qf, the pore pressure, the effective stress path and the stress ratio q/p' were investigated. The undrained shear strength was found to increase with the strain rate. The shear band formation during loading was observed for all strain rates. For each OCR test series, a linear relationship between the normalized peak deviatoric stress and the strain rate was obtained in the semi-logarithm plane. As OCR increases, the slope of best-fitting line for the linear relationship increases. Therefore, the strain rate influence on the normalized undrained shear strength is greater for higher OCRs.

Original languageEnglish
Title of host publicationSoil Behavior and Geomechanics - Selected Papers from the Proceedings of the 2014 GeoShanghai International Congress
PublisherAmerican Society of Civil Engineers (ASCE)
Pages343-352
Number of pages10
Edition236 GSP
ISBN (Print)9780784413388
DOIs
Publication statusPublished - 1 Jan 2014
Externally publishedYes
Event2014 GeoShanghai International Congress: Soil Behavior and Geomechanics - Shanghai, China
Duration: 26 May 201428 May 2014

Publication series

NameGeotechnical Special Publication
Number236 GSP
ISSN (Print)0895-0563

Conference

Conference2014 GeoShanghai International Congress: Soil Behavior and Geomechanics
CountryChina
CityShanghai
Period26/05/1428/05/14

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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