Selection for Higher Education in the Asia-Pacific Region

Combined identification of constitutive parameters and in-situ stress in layered rock mass formulated by Cosserat theory

“…This makes it necessary to include effects of joints into the mathematical formulations describing the load-deflection behavior. In addition to the discontinuous modeling method by which the joints in the rock mass and intact rock layers are modeled individually [1,2], another kind of modeling method is the continuum one by which the whole layered rock mass with joints is represented by an equivalent continuum model providing a reasonable large scale (average) description of the material response to loading especially when closely spaced joints occur in large numbers [3,4], and make the discontinuous modeling impossible.…”

“…This makes it necessary to include effects of joints into the mathematical formulations describing the load-deflection behavior. In addition to the discontinuous modeling method by which the joints in the rock mass and intact rock layers are modeled individually [1,2], another kind of modeling method is the continuum one by which the whole layered rock mass with joints is represented by an equivalent continuum model providing a reasonable large scale (average) description of the material response to loading especially when closely spaced joints occur in large numbers [3,4], and make the discontinuous modeling impossible.One of the effective equivalent continuum models is that based on the couple stress theory (Cosserat theory). In a mechanical point of view, Reference[5] and its cited papers illustrated the justification for the use of the Cosserat theory in layered rock mass, and provided numerical evidence that the Cosserat model is capable of accurately reproducing complex load-deformation patterns via a comparison with calculations conducted using the discrete joint model.…”