Journal
COMPUTERS AND GEOTECHNICS
Volume 104, Issue -, Pages 69-80Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2018.08.014
Keywords
Shear behavior; Discontinuous joints; Flat-joint model; Granite material; Rock bridge
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Funding
- State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining Technology [SKLGDUEK1710]
- Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents
- National Natural Science Foundation of China - China [51704183, 51774192, 51474135]
- Natural Science Foundation of Shandong Province China [ZR2017BEE020]
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In this paper, the shear behavior and failure mechanism of granite material bridges between discontinuous joints subjected to direct shearing were investigated using a flat-joint modeling approach. Through a comprehensive calibration and validation study, good agreement was successfully achieved considering the different normal stress levels, and three failure mechanisms were observed in both the numerical modeling and physical experiments. The joint persistency and UCS/Ts ratio were then meticulously investigated and found to have a pronounced effect on the failure mode, the peak shear strength and the shear deformation modulus of the granite samples containing discontinuous joints.
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