COMPOSITE ELEMENT METHOD FOR JOINTED ROCK MASSES REINFORCED BY HOLLOW FRICTION BOLTS

摘要

In this paper, three kinds of element models which are further developed on the base of the composite element method (CEM) are used to cover the behaviours of joints in rock and a hollow bolt in joints. The main advantage of these new models is that they can be incorporated into the conventional finite element analysis. So the mesh generation of bolted rock structures becomes more convenient and feasible, which is very important in the optimisation of reinforcement design: the calculation meshes can be generated without taking account of the existence of bolts and joints. The comparison between the calculation results with the conventional FEM and the CEM shows the robustness of the proposed method.