The influence of initial static shear on undrained cyclic loading behavior of saturated Ottawa sand has been studied using the new constant volume simple shear test together with improved sample preparation techniques. The generally held belief that increasing the level of static shear stress on horizontal planes progressively increases the resistance of sand to straining or liquefaction, as measured by the amplitude of cyclic stress, was not always found to be apolicable. This resistance was found to increase, decrease or remain unaltered with increase in static shear stress depending on factors such as relative density, shear strain level of interest and the magnitude of static shear stress. However, if the cyclic loading resistance was measured in terms of the amplitude of the maximum shear stress during cyclic loading, an increase in resistance with increasing static shear stress was always noted, irrespective of the relative density or shear strain level of interest. (Authors)

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  • Accession Number: 00302509
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 14909 Proc Paper
  • Files: TRIS
  • Created Date: Oct 27 1980 12:00AM