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本文论述了岩体工程中断裂力学数值分析的原理,阐明了在含断续节理的岩体中进行这种分析的基本方法和一般步骤。分析中考虑了荷载作用下因节理的扩展而引起的岩体物理力学性质的改变,进而导致岩体应力、变形的变化和发生节理扩展的岩体范围的扩大。根据单元性质转换原理,编制了逐次加载法的三维有限元程序。将这种分析实际运用于240m高拱坝坝肩,获得了岩体应力、变形和发生节理扩展的岩体范围等多方面的资料。
This paper discusses the principle of numerical analysis of fracture mechanics in rock mass engineering and clarifies the basic methods and general steps for such analysis in rock masses with intermittent joints. In the analysis, the physical and mechanical properties of the rock mass caused by the expansion of joints under load are considered, which in turn leads to the change of rock mass stress and deformation and the expansion of rock masses with joint expansion. According to the principle of unit property conversion, a three-dimensional finite element program was developed. This kind of analysis was applied to the 240m high arch dam abutment, and the data of rock mass stress, deformation, and the range of rock mass with joint expansion were obtained.