In this paper, we introduce a slope stability analysis method based on the finite element strength reduction method and discuss the basic principle of this method, physical significance of the safety factor, selection of yield criteria and criteria for slope failure. In the instance, we continuously reduce the slope strength parameter and then substitute it into the finite element program for slope stability calculation until the calculation does not converge. By this point, the reduction factor is the safety factor of the slope. The results show that, when the reduction factor keeps increasing and reaches a certain value, the plastic strain in the slope starts from the bottom to the top, putting the slope under the ultimate state. At this point, the reduction factor is the safety factor. The finite element strength reduction method is very applicable to slope stability analysis.
ANSYS Software, Strength Reduction, Slope Stability Analysis, Safety Factor
 Sun Z.C. (2017). Slope stability analysis based on ANSYS and the strength reduction method, Journal of WuYi University（Nature Science Edition）, Vol. 31, No. 1, pp. 65–69.
 Zhao S.Y., Zheng Y.R., Shi W.M. (2002). Analysis on safety factor of slope by strength reduction FEM, Chinese Journal of Geotechnical Engineering, Vol. 24, No. 3, pp. 343–346.
 Deng C.J., He G.J., Zheng Y.R. (2006). Studies on Drucker-Prager yield criterions based on M-C yield criterion and application in geotechnical engineering, Chinese Journal of Geotechnical Engineering, Vol. 28, No. 6, pp. 735–739.
 Yu M.H., Zan Y.W., Fan W. (2000). Advances in strength theory of rock in 20 century, Chinese Journal of Rock Mechanics and Engineering, Vol. 19, No. 5, pp. 487–490.
 Su J.H., Wang Z.X., Ren W.M. (2003). Study and application of yield criteria to rock and soil, Engineering Mechanics, Vol. 20, No. 3, pp. 72–77.
 Revilla J., Castillo E. (1977). The calculus of variation applied to stability of slope, Geotech, Vol. 27, No. 1, pp. 1–11.
 Chen Z.Y., Morgenstern N.R. (1983). Extensions to the generalized method of slices for stability Analysis, Canadian Geo Technical Journal, Vol. 20, No. 1, pp. 104–119.
 Chen Z.Y. (1992). Random trials used in determining global minimum factors of safety of slopes, Geotech, Vol. 29, pp. 225–233.
 Matsui T., San K.C. (1992). Finite element slope stability analysis by shear strength reduction technique, Soil and foundations, Vol. 32, No. 1, pp. 59–70.
 Duncan J.M. (1996). Limit equilibrium and finite element analysis of slopes, Journal of Geo Technical Engineering, Vol. 122, No. 7, pp. 577–595.
 Griffiths D.V., Lane P.A. (1999). Slope stability analysis by finite elements, Geo technique, Vol. 49, No. 3, pp. 387–403.
 Jie H., Dov Leshchinsky. (2004). Limit equilibrium and continuum mechanics-based numerical methods for analyzing stability of MSE Walls, 17th ASCE Engineering Mechanics Conference, pp. 1–8.
 Dawson E.M., Roth W.H., Drescher A. (1999) Slope Stability Analysis by Strength Reduction, Geo technique, Vol. 49, No. 6, pp. 835–840.
 Kavanagh K.T., Clough R.W. (1972) Finite element application in the characterization of elastic solids, Int J solids structures, No. 7, pp. 11–23.
 Zheng R.Z., Zhao S.Y., Song Y.K. (2005) Advance of Study the Strength Reduction Finite Element Method, Journal of Logistics Engineering College, Vol. 3, pp. 01–06.
 Jiang J.C., Yamagaini T. (2006) Charts for estimating strength parameters from slips in homogeneous slopes, Computers and Geotechnics, Vol. 33, pp. 294–304.
 Jiang J.C., Yamagaini T. (2008) A new back analysis of strength parameters from single slips, Computers and Geotechnics, Vol. 35, pp. 286–291