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Keywords: DDA, fracture, crack propagation, rock slope stability analysis.

Summary

This paper presents a method for determining the effect of crack propagation and fracturing in rock slope stability analysis. In current methods of rock slope stability analysis the shape of the slope would not change during the analysis and the failure mechanism can not consider the effect of fracturing and the new cracks that have been created during the analysis. The current methods can analyse a slope with pre- determined joints but these methods are not always safe because it has been seen that during and after failure and collapse of a slope the rock blocks had not kept their initial shape and many of them changed their shape due to fracturing and cracking so there is a need for a method that can consider block fracturing and can modify or resize the shape and size of the blocks during failure.

Discontinuous Deformation Analysis is a newly developed method and was first introduced by Shi in 1988[1]. The effect of cracking and fracturing in rock slope stability analysis was first studied by Lin[2].

In this work for determining the effect of fracturing in dynamic stability analysis of slopes some modification to the original method have been developed and implemented to the program[3]. Now this modified DDA program can evaluate the effect of fracturing and cracking of rock blocks on failure analysis of this sort of problem. Finally with some simple examples the capability of this new method has been showed.

References

1: G-H. Shi, "Discontinuous deformation analysis : a new numerical model for statics and dynamics of block systems", PhD thesis, University of California, Berkeley, USA, 1988.
2: C.T. Lin, "Extensions to the discontinuous deformation analysis of jointed rock masses and other blocky systems", PhD thesis, University of Colorado, Boulder, USA, 1995.
3: R. Naderi, "Numerical analysis of jointed rocks with successive fracturing using discontinuous deformation analysis", PhD thesis, Shiraz University, Iran,1999.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 73 PROCEEDINGS OF THE EIGHTH INTERNATIONAL CONFERENCE ON CIVIL AND STRUCTURAL ENGINEERING COMPUTING Edited by: B.H.V. Topping Paper 22 A Study of the Effect of Crack Propagation and Fracturing on Rock Slope Stability Analysis by Discontinuous Deformation Analysis R. Naderi Department of Civil Engineering, Shahrood University, Shahrood, Iran doi:10.4203/ccp.73.22 purchase the full-text of this paper Full Bibliographic Reference for this paper R. Naderi, "A Study of the Effect of Crack Propagation and Fracturing on Rock Slope Stability Analysis by Discontinuous Deformation Analysis", in B.H.V. Topping, (Editor), "Proceedings of the Eighth International Conference on Civil and Structural Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 22, 2001. doi:10.4203/ccp.73.22 Keywords: DDA, fracture, crack propagation, rock slope stability analysis. Summary This paper presents a method for determining the effect of crack propagation and fracturing in rock slope stability analysis. In current methods of rock slope stability analysis the shape of the slope would not change during the analysis and the failure mechanism can not consider the effect of fracturing and the new cracks that have been created during the analysis. The current methods can analyse a slope with pre- determined joints but these methods are not always safe because it has been seen that during and after failure and collapse of a slope the rock blocks had not kept their initial shape and many of them changed their shape due to fracturing and cracking so there is a need for a method that can consider block fracturing and can modify or resize the shape and size of the blocks during failure. Discontinuous Deformation Analysis is a newly developed method and was first introduced by Shi in 1988[1]. The effect of cracking and fracturing in rock slope stability analysis was first studied by Lin[2]. In this work for determining the effect of fracturing in dynamic stability analysis of slopes some modification to the original method have been developed and implemented to the program[3]. Now this modified DDA program can evaluate the effect of fracturing and cracking of rock blocks on failure analysis of this sort of problem. Finally with some simple examples the capability of this new method has been showed. References 1 G-H. Shi, "Discontinuous deformation analysis : a new numerical model for statics and dynamics of block systems", PhD thesis, University of California, Berkeley, USA, 1988. 2 C.T. Lin, "Extensions to the discontinuous deformation analysis of jointed rock masses and other blocky systems", PhD thesis, University of Colorado, Boulder, USA, 1995. 3 R. Naderi, "Numerical analysis of jointed rocks with successive fracturing using discontinuous deformation analysis", PhD thesis, Shiraz University, Iran,1999. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £122 +P&P)
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