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基于FLAC3D的空间滑动面准则计算格式与实现
引用本文:李 涛,廖红建,谢永利.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(Z2):3779-3785.
作者姓名:李 涛  廖红建  谢永利
作者单位:(1. 西安交通大学 土木工程系,陕西 西安 710049;2. 长安大学 公路学院,陕西 西安 710064)
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。

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
收稿时间:2010-12-21;

NUMERICAL FORMAT OF SPATIALLY MOBILIZED PLANE CRITERION AND ITS REALIZATION IN FLAC3D
LI Tao,LIAO Hongjian,XIE Yongli.NUMERICAL FORMAT OF SPATIALLY MOBILIZED PLANE CRITERION AND ITS REALIZATION IN FLAC3D[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(Z2):3779-3785.
Authors:LI Tao  LIAO Hongjian  XIE Yongli
Affiliation:(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)
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.
Keywords:slope engineering  spatially mobilized plane(SMP) criterion  intermediate principal stress  secondary development  slope stability
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