改进的V-W亚塑性模型用于堆石料应力应变研究  

Application of improved V-W hypoplastic model to stress-strain analysis of rockfill

作　　者：吴乐海 Wu Lehai(Fujian College of Water Conservancy and Electric Power,Yongan 366000,China)

机构地区：[1]福建水利电力职业技术学院,福建永安366000

出　　处：《山西建筑》2021年第12期155-157,共3页Shanxi Architecture

基　　金：福建水利电力职业技术学院教科研课题(YJKJ2007B);福建省教育厅教科研课题(JAT201144)。

摘　　要：V-W亚塑性模型考虑了颗粒破损的影响,在求取无粘性砂土的应力应变关系时效果理想,但堆石料有着更加明显的减缩特征,在求取堆石料本构关系方面应用较少。通过对V-W亚塑性模型进行改进,改进原模型中参数α和β,从而建立与围压之间的变化关系。同时,增加体应变控制项λtr(D)T/tr(T),使模型更加适用于堆石料体应变特征。通过将改进的V-W亚塑性模型曲线与堆石料大型三轴试验曲线对比分析,验证了改进后的V-W亚塑性模型在应用于分析堆石料本构关系的可行性。The V-W hypoplastic model takes the effect of particle breakage into account,and the effect is ideal when calculating the stress-strain relationship of cohesionless sand,but the rockfill material has more obvious shrinkage characteristics,so it is less used in calculating the constitutive relationship of rockfill material.By improving the V-W hypoplastic model and improving the parametersαandβin the original model,the relationship between the parameters and the confining pressure is established.At the same time,the volume strain control term is added to make the model more suitable for the characteristics of rockfill volume strain.By comparing the improved V-W hypoplastic model curve with the large-scale triaxial test curve of rockfill,the feasibility of applying the improved V-W sub plastic model to analyze the constitutive relationship of rockfill is verified.

关 键 词：V-W亚塑性模型 参数改进 堆石料 本构关系 

分 类 号：TV214[水利工程—水文学及水资源]