岩体的三维弹粘塑性块体理论与P型自适应分析

The complete identification algorithm for rock block system is presented firstly in the research, based on which the relevant file concerning the messages of the block system can be obtained. Then the unconfined seepage analysis model for the discontinuity system is proposed, in which the main attention has been paid to the simulation of the drainage and grouting curtains. Next, the p-version adaptive FEM has been implemented and the crack propagation simulation has been realized. For every rock block the standard hierarchical finite element is endued to comprise the block, which is called as 'overlay', in this way the p-version adaptive FEM can be transplanted to formulate the governing equation of the hierarchical block element method for the rock block system. By the best guess of the exact solution using higher order results, the error estimation and p-version adaptivity are established. The crack propagation analysis is conducted by the simulation of the crack face with data files. The research has been pushed further to develop reinforcement analysis, dynamics analysis, coupled analysis with conventional FEM and trial load method, etc. The above theoretical results have been verified by the laboratory tests using geo-material models. The complicated arch dam abutment slope of Xiaowan Project is studied with the above methodology, from which the good social and financial benefits have been achieved.

提出复杂块体系统的识别方法。用完备系对岩块位移场进行分片插值，通过变分方程．岩块与结构面变形几何方程以及结构面的弹粘塑性本构方程，建立求解岩体变形和破坏的控制方程。通过恢复估计离散误差，对插值阶数实现自适应。成果计算简变且精确，还可方便地追踪坏面的扩展过程，对岩石力学新理论的研究和岩体工程结构安全度评价有意义。