STRENGTH PROPERTIES OF JOINTED ROCK MASSES BASED ON THE HOMOGENIZATION METHOD |
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| Authors: | Hongtao Zhang Jianming Zhu Yinghua Liu Bingye Xu Xiaochun Wang |
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| Institution: | 1. Department of Civil Engineering, North China University of Technology, Beijing 100144, China
2. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China |
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| Abstract: | This paper aims to determine the strength properties of jointed rock masses by means of the homogenization method. To reflect the microstructure of jointed rock masses, a representative element volume (REV) is selected. Assuming being rigid and perfectly plastic and utilizing the Mohr-Coulomb yield criterion for rock and joints, an upper bound limit analysis method is proposed based on the homogenization theory. By using the finite element method and Goodman joint element, a nonlinear mathematical programming with equality constraints is formulated, which can be solved by a direct iterative algorithm. Numerical results show the strength of jointed rock masses behaves anisotropy with different joint directions. This method presents an effective tool for the strength analysis of jointed rock masses. |
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| Keywords: | jointed rock mass homogenization representative element volume (REV) upper bound limit analysis anisotropy |
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