3D numerical analysis of shear mechanical behavior for interface between interact ional bi-body

It is important to research the mechanical behavior of the rock/rock and rock/concrete joints for the assessment of stability issues involving rock masses and engineering foundations. A finite element model of 3D rough surface unchanged in its width is established by employing ANSYS to simulate the direct shear test conducted by Bandis et al; then compared with the test results, some moderate well numerical results are acquired, which testified that it is feasible to apply ANSYS program to analyze the bi-body shear performance. In addition, several regular sawtooth interface computational models are used to examine the shear strength theoretical formula of Patton, consequently; it is proved again that using ANSYS to model the shear behavior is applicable. Furthermore, the evaluation of this paper focuses on the analysis of the shear stress-displacement curve, shear distribution on contact plane and dilatancy effect as well as cohesion effect.