裂隙岩体宏观力学参数的二维数值模拟

岩体通常含许多不同尺度的裂隙,因而力学性质非常复杂。由于现场测试及常规实验室试验常受各种条件的限制,因而其不能准确反映岩体的宏观物理力学性质。本文基于有限元分析软件对二维情况下的完整岩体和含不同倾角的软弱夹层的岩体在单轴和双轴压缩下进行了数值模拟,得到岩体变形的应力-应变曲线。该类曲线能反映裂隙对岩体力学参数的影响,对于指导工程实践有一定的意义,并且为获取岩体力学参数提供了新的途径。

Two-dimensional numerical simulation of macro-mechanical parameters for fractured rock masses

Fractured rock masses have complicated mechanical properties because they contain microscopic defects of various scales. Their macro-mechanical properties could hardly be depicted through in-situ and lab tests which are generally limited by experimental conditions. This study used the finite element analysis software to simulate the axial and biaxial compression of intact rock and rock with weak interlayers of different dipping angles. The stress-strain curves obtained are in very good agreement with the conventional laboratory results. This indicates that the numerical simulation could provide some insights for the macro-mechanical properties of fractured rocks in geotechnical engineering.