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用线弹性有限单元法计算含一条断裂的三维地块模型中应力的空间分布,结果表明:当地块边界受到水平均布荷载时,断层两个端点水平位移最小,垂直位移最大,应力值最高,且随距离的增加而迅速减小到近于外区应力。最小主应力、最大剪应力、位移均以断层中点呈四象限对称分布。水平主应力之和随深度线性增加。三个应力主轴常稍稍偏离垂线和水平面,但最大压应力呈水平分布。
The linear elastic finite element method is used to calculate the spatial distribution of stress in a three-dimensional block model with one fracture. The results show that when the boundary of the block is subjected to horizontal uniform load, the horizontal displacements of the two ends of the fault are the smallest, the vertical displacements are the maximum and the stress is the highest, And decreases rapidly to near the outer zone as the distance increases. The minimum principal stress, the maximum shear stress and the displacement are symmetrically distributed in four quadrants at the midpoint of the fault. The sum of the horizontal principal stresses increases linearly with depth. The three stress axes often deviate slightly from the vertical and the horizontal plane, but the maximum compressive stress is distributed horizontally.