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http://dx.doi.org/10.9720/kseg.2021.3.357

Analysis of Shear Properties from the Numerical Shear Test on Rock Joints with PFC2D  

Noh, Jeongdu (Department of Energy and Resources Engineering, Chosun University)
Kang, Seong-Seung (Department of Energy and Resources Engineering, Chosun University)
Publication Information
The Journal of Engineering Geology / v.31, no.3, 2021 , pp. 357-366 More about this Journal
Abstract
Shear behavior dependent on the shape and roughness of rock joints can greatly influence the stability of the ground and rock structures. The efficient design of rock structures requires understanding of the shear behavior due to joints and accurate calculation of the shear strength. This work reports numerical shear tests using PFC2D on No. 1 (JCR-1), with smooth joints, and No. 7 (JRC-7) and No. 9 (JRC-9), with relatively rough joints, for the 10 shapes of standard joint profiles proposed by Barton and Choubey (1977). The aim was to investigate the shear behavior of rock joints with respect to their roughness. The results show the maximum shear stress to be about 3.2 to 5.0 times greater in the rougher JRC-7 and JRC-9 joints than in smoother JRC-1. The maximum shear displacement was approximately 4.1 to 5.8 times greater at the first normal stress than at the second. The rougher joints showed friction angles of the rock joints that were approximately 1.8 to 3.9 times greater than that in the smooth joint. Overall, increasing the rock joint roughness increased the maximum shear stress and friction angle.
Keywords
rock joint; shear behavior; roughness; PFC2D; maximum shear stress; friction angle;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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