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Experimental and mathematical modeling for fracture of rock joint with regular asperities |
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| Authors: | T.H. HuangC.S. Chang C.Y. Chao |
| Affiliation: | a National Taiwan University, Taipei, Taiwan 106, ROC b Department of Civil and Environmental Engineering, University of Massachusetts, 253 Marston Hall, Box 35205, Amherst, MA 01003-5205, USA c Chung-Cheng Institute of Technology, Tauyen, Taiwan 320, ROC |
| Abstract: | This paper is aimed at developing a mathematical model for the deformation behavior of a rock joint that explicitly accounts for the effects of joint surface topography. The present work is focused on rock joints with triangle-shaped regular asperities. Specimens of artificial rock joint with triangle-shaped asperities were made of simulated rock material and tested in the laboratory. Experimental results are examined to identify three mechanisms that influence the deformation of a rock joint: sliding, separation of asperity contact-faces, and shear fracture of asperities. A modeling methodology is then described and the behaviors of an asperity contact-face, including separation, sliding and shear fracture are discussed. The stress-deformation relationship of a rock joint is subsequently derived and the model performance is evaluated by comparing the predicted results from the derived model and the measured results from experiments. |
| Keywords: | Fracture Rock joint Shear behavior Dilation Friction |
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