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http://dx.doi.org/10.7474/TUS.2011.21.2.093

Study on a 3-Dimensional Rock Failure Criterion Approximating to Mohr-Coulomb Surface  

Lee, Youn-Kyou (군산대학교 해양건설공학과)
Publication Information
Tunnel and Underground Space / v.21, no.2, 2011 , pp. 93-102 More about this Journal
Abstract
In spite of being unable to take into the effect of intermediate principal stress, Mohr-Coulomb and Hoek-Brown criteria are very popular as rock failure criteria. The recent researches reveal that the influence of intermediate principal stress on the failure strength of rock is substantial, so that 3-D failure criteria in which the intermediate principal stress could be considered is necessary for the safe design of the important rock structures. In this study, the likely application of the 3-D failure criterion proposed by Jiang & Pietruszczak (1988) to the prediction of the true triaxial strength of rock materials is discussed. The failure condition is linear in the meridian plane of principal stress space and it is represented by the smooth surface contacting the corners of the Mohr-Coulomb surface. The performance of the Jiang & Pietruszczak's criterion is demonstrated by simulating the actual true triaxial tests on the rock samples of three different rock types.
Keywords
Intermediate principal stress; True triaxial compression test; Rock failure criteria; Mohr-Coulomb criterion;
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