摘要
根据三轴压缩试验的应力-应变曲线,运用Hoek提出的由主应力圆包络线确定粘聚力和内摩擦角等效值的方法和曲线拟合的方法,研究了围压对软岩峰后软化特性的影响和软岩的宏观物性参数峰后应变软化规律,建立了峰后应变软化数值模型。利用该数值模型对三轴试验进行数值模拟,其结果与试验数据吻合。
The influence of confining pressure on the post-peak softening rule of soft rock has been researched. Based on the stress-strain curve of triaxial experiments, the softening law of physical property parameters is studied; and a post-peak softening numerical model is established by means of the technique of determining the equivalent cohesion and friction and the curve-fitting. Al last, the numerical simulation based on the model approximately matches the triaxial experiments.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2002年第6期695-697,701,共4页
Rock and Soil Mechanics
关键词
围压
峰后应软化
数值模型
软岩巷道
Computer simulation
Friction
Mathematical models
Physical properties
Pressure
