Mechanical response of discontinuities of different joint wall contact strengths |
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| Authors: | A Ghazvinian M J Azinfar P Norozi |
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| Institution: | 1. Rock Mechanics Group, Department of Mining Engineering, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran
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| Abstract: | An intensive investigation was set up to study the mechanical response of discontinuities with different joint wall compressive strengths. Physical models were employed in order to perform the planned studies. Models were designed to contain profiles of regular artificial joints molded by five types of plaster mortars each of which representing a distinct uniaxial compressive strength. The compressive strengths of plaster specimens ranged from 5.9 to 19.5 MPa. These specimens were prepared considering to have discontinuities of regular triangular asperity profile and were so designed to achieve joint walls of different strength material combinations. Direct shear tests were carried out on joints, and variations of shear stiffness, normal stiffness, and residual friction angle were investigated in various states. Details of the experiments, obtained data, the performed analyses, and the results are presented in this paper. |
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