Stress-Strain Behavior of Jointed Rock - Rock Mechanics Based on an Anisotropic Jointed Rock Model - page 75

Figure 3.21 Stress-displacement behavior of persistent discontinuities

Based on the results of cyclic direct shear tests reported in Huang et al. (1993) a
stress-displacement relationship for discontinuities under cyclic loading conditions was
derived by Qiu et al. (1993). The model formulated by Saeb & Amadei (1992) was ex-
tended by Souley et al. (1995) to include cyclic loading and was validated by experimen-
tal data taken from Wibowo et al. (1993).

3.4 Rock Mass

3.4.1 Discrete Model
The stress-strain behavior of jointed rock includes the deformability and strength of
both intact rock and discontinuities. Thus, along with the deformability and strength of
the intact rock the larger deformability and smaller strength of the discontinuities must
be accounted for. This can be accomplished by simulating the intact rock as a continu-
um, and each discontinuity in the rock mass individually (discretely). In this regard, the
reader is referred to numerical procedures that are used for discrete modeling of jointed
rock. Beside methods based on discontinuum mechanics such as the distinct element