A New Method for 3D Modeling of Joint Surface Degradation and Void Space Evolution Under Normal and Shear Loads
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The roughness of the joint surfaces strongly influences the mechanical and hydraulic behavior of the joints, especially under shearing. Once shearing is initiated, only certain fractions of the joint surfaces remain in contact and every asperity contributes to the shear behavior depending on their respective heights and dip angles. In addition, several asperities would be damaged, and the debris accumulate and form gouge in the joint surface upon shearing (Ladanyi and Archambault 1970; Archambault et al. 1997; Riss et al. 1997; Belem et al. 2007), so the joint surface topography, and the void space which is comprised of the separation and the contact between two rough surfaces, continuously change with shearing. In the majority of the analyses of the joint shearing behavior, joint roughness has been characterized based on the initial joint surfaces and remained constant regardless of shearing (Grasselli and Egger 2003; Belem et al. 2009; Asadollahi and Tonon 2010;...
KeywordsJoint surface Void space Degradation Evolution
This study was supported by the National Natural Science Foundation of China (No.41327001, No.41472248).
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