EVALUATION OF CRITICAL STATE LINE UNDER CYCLIC LOADINGS

The crtical state line under static and cyclic loadings was established from an extensive series of drained triaxial tests on Ottawa sand. By applying boundary and elastic energy corrections suggested by Roscoe et al, for the Cambridge Model, a theoretical critical state line was obtained. The energy corrections suggested by Burland for the modified Cambridge model, were also applied. The theoretical lines so obtained are compared with the experimental data. It was found that the slope of the critical state line for loose and dense sand under static loadings is approximately the same. Under cyclic loadings the slope is consistently ten percent higher for dense sand than for loose sand. For static conditions the Cambridge model energy correction overestimates the experimental slope by about five percent, while the modified Cambridge model energy correction underestimates it by about 15 percent. For cyclic tests both of these corrections overestimate it by less than 10 percent. For careful measurements of volumetric strain large diameter samples should be used.

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  • Accession Number: 00178399
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 13755
  • Files: TRIS
  • Created Date: Sep 14 1978 12:00AM