【作者】 周维垣； 刘元高； 赵吉东； 杨强；

【Author】 Zhou Weiyuan;Liu Yuangao;Zhao Jidong;Yang Qiang Dept. of Hydr. Engng, Tsinghua Univ, Beijing 100084 China

【机构】 清华大学水利系；

【摘要】 本文根据裂隙岩体的几何特征,定义了反映裂隙岩体力学特征的损伤张量。根据包含损伤演化的弹塑性本构关系,对含有节理裂隙岩体在发生局部化破坏时的特征进行分叉局部化分析,构造了适用于节理裂隙岩体局部化分析的不连续分叉模型。利用非线性规划数值解法,可以得出局部化破坏的方向特征。在有限元方法中,根据该模型给出了节理裂隙岩体相关的算例,分析表明这一模型用于分析裂隙岩体的局部化破坏是有效的。更多还原

【Abstract】 In this paper,the damage tensor has been defined based on the mechanical properties of jointed rocks.In the frame of irreversiblethermo-dynamics,the constitution law of the jointed rocks with damage was formulated. In order to analyze the failure model of the jointedrocks,a discontinuous bifurcation model was used and numerical method was designed to tackle it. With the aid of FEM,resulte of several cor-responding specimen with initial randomly distributed cracks under tension and compression were studied.更多还原