论文部分内容阅读
在岩体工程分析中,合理地判别岩体的破坏模式及其相应的强度有着重要的意义。由于复杂岩体存在节理弱面系统,所以它的破坏和强度明显地受到岩体构造和应力状态的影响,从而呈现出各向异性的特点。然而这一问题尚未受到应有的重视。本文根据理论分析和试验资料对此进行了探讨,提出了考虑弱面影响的三维和二维理论模式和判别准则,并对二维问题进行了模拟试验和非线性有限元分析。文中介绍了试验和计算结果对比的情况,并对破坏模式和强度的各向异性问题及其有限元应用进行了讨论和分析。
In rockmass engineering analysis, it is of great significance to reasonably discriminate the failure mode and corresponding strength of rock mass. Because of the existence of joint weak surface system in complex rock mass, its damage and strength are obviously affected by the rock mass structure and stress state, and thus exhibit anisotropic characteristics. However, this issue has not yet received the attention it deserves. Based on the theoretical analysis and experimental data, this paper discusses it, proposes three-dimensional and two-dimensional theoretical models and criteria for considering the influence of the weak surface, and conducts simulation tests and nonlinear finite element analysis on the two-dimensional problems. In this paper, the comparison of experimental and calculation results is introduced. The anisotropic problem of failure mode and strength and its finite element application are discussed and analyzed.