基于FLAC3D的空间滑动面准则计算格式与实现

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摘要通过求解一元三次方程得出塑性因子，推导空间滑动面(SMP)准则在FLAC3D中的计算格式。基于FALC3D提供的二次开发平台，通过编制C++代码形成dll文件，将SMP准则导入FLAC3D中，实现在FALC3D软件中SMP准则的二次开发，并给出编程基本过程。通过进行真三轴数值试验、厚壁圆筒受内压的解析解与数值解的对比、边坡稳定性的计算验证模型开发的可行性。分别采用莫尔–库仑准则和SMP准则分析一边坡稳定性，得出SMP准则与莫尔–库仑准则计算边坡稳定有相似的破坏过程，由于SMP准则考虑了中间主应力对材料屈服面的影响，前者的安全系数高于后者；在相同折减系数下，边坡的塑性区和位移量均小于莫尔–库仑准则计算的结果。

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关键词 ：边坡工程, 空间滑动面(SMP)准则, 中间主应力, 二次开发, 边坡稳定

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.

Key words： slope engineering spatially mobilized plane(SMP) criterion intermediate principal stress secondary development slope stability

收稿日期: 2010-12-21

引用本文:

李涛1，廖红建1，谢永利2. 基于FLAC3D的空间滑动面准则计算格式与实现[J]. 岩石力学与工程学报, 2011, 30(S2): 3779-3785.
LI Tao1，LIAO Hongjian1，XIE Yongli2. NUMERICAL FORMAT OF SPATIALLY MOBILIZED PLANE CRITERION AND ITS REALIZATION IN FLAC3D. , 2011, 30(S2): 3779-3785.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/IS2/3779

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