Critical peak failure stress envelopes for the Porce III Feldspar-Quartz-Mica Gneiss
This article compares seven bi-dimensional and seven three-dimensional failure criteria, with the objective of determining the theoretical critical peak failure stress envelope that the laboratory results obtained from a slight anisotropic Feldspar-Quartz-Mica Gneiss represent the most. The Gneiss has a perfect brittle linear elastic behavior. In order to define the failure envelopes, sixteen indirect traction tests, five uniaxial compressive strength and six axisymmetric triaxial compression tests were performed. For the last two test types, a high stiffness servo controlled compression machine was used. Also, the method used for the axisymmetric triaxial compression test was the multiple failure state test, which permitted to obtain more points at the peak state for each tested sample. For the studied Gneiss, it is concluded that the Non Linear Mohr-Coulomb bi-dimensional and the Non Linear Drucker-Prager three-dimensional theoretical envelopes accommodate better to the laboratory data results obtained for the peak state. The Gneiss belongs to the hoisting rock mass of the Porce III Hydroelectric Powerhouse Chamber, located in Colombia- South America.
L.O.Suarez-Burgoa
Universidad Nacional de Colombia, Medell(i)n Universidade de Bras(i)lia (UnB)
国际会议
香港
英文
1-5
2009-05-19（万方平台首次上网日期，不代表论文的发表时间）