Analysis On The Dynamic Stability Of Rockmass Slope

According to the points of the question for discussion, this paper described the dynamic property of the rocks, then recommended the constitutive equations which could simulate the dynamic characteristic of the rock and analyzed the limitations of the models. At the same time, we believed that the static constitutive equations must have applied to the dynamic analysis because of the comparability of static and dynamic constitutive curves. Based on the discussion, this paper expatiated the essential principle of the plastic mechanics in rocks include the material yield criterion, loading-unloading criterion, plastic potential theory, hardening rules, and application in geotechnical engineering.This paper summarized the characteristic and localizations of the special contact elements that can simulate the joints in rockmass. Except for those, three kinds of numerical methods for dynamic contact analysis were introduced. Then, the augment Lagrangian method that combined Lagrangian multiplier and penalty function was applied to the dynamic contact analysis with friction. Besides, the basic equation of FE was discussed. Based on the analysis, we gave an example to study the dynamic contact with friction of the intermittent joint, and got some essential rules: the friction coefficient couldn't influence the distributing of dynamic stress on the contact surface, and the roading rates affected evidently on the dynamic characteristic on the contact surface.In the last part, this paper made respectively use of the time-history method and the response spectrum method to analyze the dynamic response of the rock slope on Baise Hydraulic Power Plant, and got the coincident resultant. Simultaneously, the contact theory was applied to study the stability of the intermittent joints. The analytical resultant showed that the coupled interaction of the dynamic load and other(i.e. seepage force) result in the instability of the rockmass slope.