APPLICATION OF MOHR-COULOMB EQUIVALENT AREA YIELD CRITERION TO SLOPE STABILITY ANALYSIS
Li Yin 1) ; Su Kai 2) ; and Li Jie 3,4)
1)Earthquake Administration of Hubei Province, Wuhan 4300712)State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University，Wuhan 4300713)Seismological Bureau of Xinjiang Uygur Autonomous Region, Urumqi 8300114)Institute of Geophysics & Geomatics, China University of Geosciences, Wuhan 430074
Abstract：On the basis of the extended Drucker-Prager yield criterion in ABAQUS program, Mohr-Coulomb equivalent area circle yield criterion is adopted and how the equivalent material parameters are calculated is described. The divergence is assumed as the flag to tell the slope sliding. And the stability of a certain typical soil slope is analyzed by use of MohrCoulomb yield criterion with different circle, such as circumscribed circle, inscribed circle, internal tangential circle and equivalent area circle. When the material parameter k is 0.8, compared by the limit equilibrium methods, the safety factors of slope under MohrCoulomb yield criterion with circumscribed circle and inscribed circle are bigger but that with internal tangential circle less,and that with equivalent area circle closest. Furthemore, with the increasing of k, the iterative computation converges more easily and the safety factor of slope becomes too big, so the value of k is suggested to take from 0.8 to 0.9.
