岩石三轴压缩变形破坏特征与模拟方法研究
Research on Deformation Failure Characteristic and Simulation Method of Rock under Triaxial Compression
彭毓琛 1张超1
作者信息
- 1. 湖南科技大学 土木工程学院,湖南 湘潭 411201
- 折叠
摘要
岩石变形破坏规律及其模拟方法是岩石工程稳定性分析的基础.文章针对粗大理石试验曲线,获得岩石阶段性变形特征及特征应力的变化规律,基于摩尔-库伦准则和德鲁克-普拉格准则建立统计损伤本构模型,将模型曲线与试验曲线进行对比分析.结果表明:粗大理石特征应力与围压呈线性正相关,峰后变形特征受围压影响显著,文章提出的模型能反映岩石阶段性变形规律,针对峰后变形特征的模拟效果,摩尔-库伦准则优于德鲁克-普拉格准则.
Abstract
Rock deformation failure law and its simulation method are the basis of rock engineering stability analysis.According to the test curve of coarse marble,the staged deformation characteristics and the change law of charac-teristic stress of rock are obtained.Based on Mohr-Cou-lomb criterion and Drucker-Prager criterion,the statistical damage constitutive model is established,and the model curve is compared with the test curve.The results show that the characteristic stress of coarse marble is linearly and positively correlated with confining pressure,and the post-peak deformation characteristics are significantly af-fected by confining pressure.The model proposed in this paper can reflect the staged deformation law of rock.For the simulation effect of post-peak deformation charac-teristics,Mohr-Coulomb criterion is better than Druck-er-Prager criterion.
关键词
岩石工程/变形规律/统计损伤/本构模型Key words
rock engineering/deformation law/statistical damage/constitutive model引用本文复制引用
出版年
2024
NETL
NSTL
万方数据