Non-uniformity of stresses within a sand specimen in triaxial shear

Q. Fu, Y. M.A. Hashash, J. Ghaboussi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Non-uniformity of deformations has always been a concern in interpretation of laboratory triaxial test results due to boundary effects. This paper describes the application of a relatively novel inverse analysis framework, SelfSim (Self learning simulations), which permits the extraction of relevant soil behavior using boundary measurements of load and displacement to triaxial compression tests with frictional ends on a sand specimen. Extracted soil behavior shows increased void ratio towards the middle of specimen. Soil elements along the central axis and mid-plane of the specimen do not experience principal stress rotation during shear while significant principal rotation is computed elsewhere in the soil specimen. The extracted soil behavior is used to interpret a range of mobilized internal friction angles under a variety of loading modes. The analysis provides greater insight into the sand behavior than the simple interpretation of behavior using global measurements of force and displacements.

Original languageEnglish (US)
Title of host publicationProceedings of the 10th International Symposium on Numerical Models in Geomechanics NUMOG 10 - Numerical Models in Geomechanics NUMOG 10
Pages621-626
Number of pages6
StatePublished - Dec 1 2007
Event10th International Symposium on Numerical Models in Geomechanics NUMOG 10 - Numerical Models in Geomechanics NUMOG 10 - Rhodes, Greece
Duration: Apr 25 2007Apr 27 2007

Publication series

NameProceedings of the 10th International Symposium on Numerical Models in Geomechanics NUMOG 10 - Numerical Models in Geomechanics NUMOG 10

Other

Other10th International Symposium on Numerical Models in Geomechanics NUMOG 10 - Numerical Models in Geomechanics NUMOG 10
CountryGreece
CityRhodes
Period4/25/074/27/07

ASJC Scopus subject areas

  • Soil Science
  • Numerical Analysis

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