ELASTO-PLASTIC STIFFNESS MATRIX OF ROCK MASS ELEMENT WITH SOFT CLAY STRATA AND ITS APPLICATION
(Central-South University of Technology; Changsha; Hunan; 410083; China)
Abstract: The fault element is used to handle soft clay strata in a rock mass.The formulas or clasto-plastic stiffness matrix for the fault element are derived using the constitutive relationship between plastic increment stress and strain.A numerical example of a circular tunnel with soft clay strata in the rock medium are examined.
Key words: rock mass clement fault; clasto-plastic; stiffness matrix