EVALUATION OF CYCLIC SHEAR STRENGTH OF TWO CEMENTED CALCAREOUS SOILS

The mechanism controlling the cyclic shear strength of cemented calcareous soils was investigated based on results obtained from monotonic and cyclic triaxial tests on 2 different types of calcareous soil. Undrained cyclic triaxial tests performed on artificially cemented calcareous soils with different loading combinations showed that the effective stress path moved towards or away from the origin, due to the generation or dissipation of pore pressure with progressive cycles. Prior investigations have shown that the Peak Strength Envelope, State Boundary Surface, or Critical State Line forms a boundary beyond which effective stress paths during cyclic loading cannot exist. However, in this study it was observed that the maximum stress ratio obtained from monotonic tests defined the boundary for the cyclic tests. Based on data obtained from this study, an approach for evaluating the cyclic shear strength is proposed. It was observed that the modified normalized cyclic shear strength had a strong linear relationship with the logarithm of the number of cyclic to failure irrespective of confining pressure, type of consolidation, and stress reversal.

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  • English

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  • Accession Number: 00960579
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 12 2003 12:00AM