非线性K-G模型对胶凝砂砾石材料的适应性  

Adaptive Research of Nonlinear K-G Model to CSG Material

作　　者：孙明权[1] 刘运红[1] 贺懋茂[1] 

机构地区：[1]华北水利水电学院,河南郑州450011

出　　处：《人民黄河》2013年第7期92-94,97,共4页Yellow River

基　　金：水利部公益性行业科研专项(201301025)

摘　　要：非线性K-G模型最初是基于堆石料三轴试验提出的土体本构模型。胶凝砂砾石材料是一种力学性质极其复杂的新型筑坝材料,其颗粒组成和力学性质与堆石料有较大的区别。通过试验研究,在非线性K-G模型的基础上,提出了该模型的体积变形模量Kt和剪切变形模量Gt的求取方法。根据三轴试验数据,利用该模型计算相应参数,并预测应力—应变曲线,结果表明:该模型能较好地模拟胶凝砂砾石材料的应力—应变曲线,能用于胶凝砂砾石材料的相关计算分析。Nonlinear K-G model is proposed as the soil constitutive model based on the rock fill triaxial test.CSG material is a new type of dam materials,its mechanical property is very complicated,and its grain composition and mechanical properties are greatly different from the rock fill material.Through the experimental research,based on the nonlinear K-G model,this paper has proposed the calculating method of this model’s volume deformation modulus Kt and shear modulus of deformation Gt.According to the triaxial test data,this paper uses the model for calculating the related parameters and predicting the stress-strain curve.The results show that the model can better simulate CSG material’ s stress-strain curve,and can be used for related calculation and analysis of CSG material.

关 键 词：胶凝砂砾石材料 非线性K-G模型 应力—应变 剪胀性 应变软化 

分 类 号：TV43[水利工程—水工结构工程]