岩体节理模型的节点偶对分析

NODAL COUPLING ANALYSIS OF ROCK JOINT MODEL

本文提出一种节点偶对分析用以解决岩体节理模型的数学模拟问题。为改善Goodman单元,M. Katona提出了不考虑刚度系数的摩擦-滑动节理模型。但是,由于缺乏可行的分析方法,因而得不到真实可信的结果,特别是出现块体相互嵌入问题,影响了它的实际应用。本文提出的节点偶对分析建立在几何-力学约束边界的序列矢量判定的基础上,计算结果完全合理。利用这一方法还可顺利地解决节理交汇组合等复杂的岩体力学问题,是一个有前景的方向。

A nodal coupling analysis is suggested in this paper to solve the problem of numerical modelling of rock joints. To improve the Goodman element, M. Katona proposed a friction-sli ding model of joints. However, due to lack of feasible method of analysis it is difficult to obtain the exact and reliable results, and par-ticularly due to problem of mutual intruding of solid elements each into other, the applicationof Katona's element is limited. The nodal coupling analysis proposed in this paper is based on the sequential vector determination. The computed results are reasonable. By using the proposed procedure some complex problems in rock mechanics with combinative model of intersected joints can be solved successfully.