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| NUMERICAL FORMAT OF SPATIALLY MOBILIZED PLANE CRITERION AND ITS REALIZATION IN FLAC3D |
| LI Tao1，LIAO Hongjian1，XIE Yongli2 |
(1. Department of Civil Engineering，Xi?an Jiaotong University，Xi?an，Shaanxi 710049，China；
2. School of Highway，Chang?an University，Xi?an，Shaanxi 710064，China) |
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Abstract The numerical format in FLAC3D of spatially mobilized plane(SMP) criterion was derived and the plasticity factor λs is obtained by solving a cubic equation. Then the SMP criterion is imported into FLAC3D on the secondary development platform provided by the software using a dll document developed by C++. The feasibility of the dll document was certified by the comparison between numerical and analytical results of true triaxial numerical test，thick-walled cylinder problem and slope stability analysis. Slope stability analysis indicates that the slope failure processes are similar calculated by M-C and SMP criterion. The factor of safety calculated by SMP criterion is bigger than M-C and the plastic zone and displacement calculated by SMP is smaller than M-C using the same reduction factor because SMP criterion can consider the influence of intermediate principal stress on the yield surface.
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Received: 21 December 2010
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2011, Vol. 30 
