考虑饱和度影响的玄武岩变形损伤规律与本构模型  

Deformation Damage Laws and Constitutive Model of Basalt Considering Saturation Effects

作　　者：谭尧升 李博文 陈文夫 裴磊 荣冠[3] TAN Yao-sheng;LI Bo-wen;CHEN Wen-fu;PEI Lei;RONG Guan(China Three Gorges Corporation,Beijing 100038,China;China Three Gorges Construction Engineering Corporation,Chengdu 610041,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,China)

机构地区：[1]中国长江三峡集团有限公司,北京100038 [2]中国三峡建工(集团)有限公司,四川成都610041 [3]武汉大学水资源工程与调度全国重点实验室,湖北武汉430072

出　　处：《水电能源科学》2025年第4期115-119,共5页Water Resources and Power

基　　金：中国长江三峡集团公司科研项目(BHT/0811)。

摘　　要：为研究水岩作用下玄武岩变形与强度演化规律,以白鹤滩水电站玄武岩为研究对象,通过单轴压缩试验,研究饱和度对玄武岩力学性能的影响规律,建立考虑饱和度影响的变形损伤模型和本构模型,分析水岩作用对岩石力学性能的弱化机理。结果显示,玄武岩的单轴抗压强度、弹性模量、裂纹起裂应力和裂纹损伤应力等力学指标随着饱和度的增加而降低,玄武岩的软化系数为0.821。建立了考虑饱和度影响的玄武岩的变形损伤演化方程和本构模型,本构模型与试验结果的相对误差小于±2.5%,合理有效。To investigate the deformation and strength evolution of basalt under hydro-mechanical interactions,this study focuses on basalt in the Baihetan Hydropower Station.Through uniaxial compression experiments,the impact of saturation on the mechanical properties of basalt was studied.Considering the effect of saturation,deformation-damage models and constitutive models were established to analyze the weakening mechanism of water-rock interaction on rock mechanical properties.The results show that the uniaxial compressive strength,elastic modulus,crack initiation stress,and crack damage stress of basalt decreased with increase of saturation,with a softening coefficient recorded at 0.821.Deformation-damage evolution equations and constitutive models for basalt were developed by considering saturation effects.The relative error between the constitutive models and experimental results was less than±2.5%,and it is reasonable and effective.

关 键 词：玄武岩 饱和度 水岩作用 变形损伤 本构模型 

分 类 号：TV223.1[水利工程—水工结构工程] TV41