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。
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 characteristic stress of rock are obtained.Based on Mohr-Coulomb 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 confi ning pressure,and the post-peak deformation characteristics are signifi cantly affected by confi ning pressure.The model proposed in this paper can refl ect the staged deformation law of rock.For the simulation effect of post-peak deformation characteristics,Mohr-Coulomb criterion is better than Drucker-Prager criterion.
作者
彭毓琛
张超
PENG Yuchen;ZHANG Chao(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China)
出处
《工程技术研究》
2024年第16期14-16,71,共4页
Engineering and Technological Research
关键词
岩石工程
变形规律
统计损伤
本构模型
rock engineering
deformation law
statistical damage
constitutive model
