LI Chun-guang, ZHU Yu-fei, LIU Feng, et al. Evaluation of strength reduction factor by lower bound limit analysis using finite element method[J]. 2012, 33(6).
LI Chun-guang, ZHU Yu-fei, LIU Feng, et al. Evaluation of strength reduction factor by lower bound limit analysis using finite element method[J]. 2012, 33(6).DOI:
For the strength reduction factor commonly used in geotechnical engineering
its lower limit programming problem is nonlinear and can’t be solved directly by linear programming. Based on the lower limit method and the feature of strength reduction factor and overload factor
the strength reduction factor can be obtained by adjusting the shear strength when the overload factor approach to 1
and thus linear programming algorithm can be fully used. It is shown that the fitted hyperbolic curve method is more efficient and has larger convergence range than conventional methods
such as bisection method and secant method. Suggested method can take full advantage of the efficientcy of linear programming
and is also suitable for application in engineering.