Researches on evolution of sliding surface with pattern dynamics

Landslides generally occur on the main slide surface with the lowest strength among the discontinuities.Evaluation of sliding surface is considered as an extensively dissipative dynamic complex system varying in time and space and there are mass and energy exchanges between the sliding surface and the external environment.In the process of evolution,sliding surface represents a self-organized criticality(SOC) phenomenon far away from the equilibrium state.SOC is the dynamic attractor in the process of slide surface penetrating.With the help of pattern dynamic model,the “domino-effect” and the “chain reaction” process of slide surface failure were analyzed.A kind of auto-amplifying interacting link process among damage units was described with deterministic,irreversible,nonlinear,and non-local dynamic rules without characteristic scale.Distribution functions φ(p) and ξ(p) were introduced to describe the distributions of fracture attractive domain in phase space.Finally,the potential destructive patterns of sliding surfaces with different damage ratio were discussed.