不同应力路径下粉煤灰本构模型研究  

Study on constitutive model of fly ash under different stress paths

作　　者：胡德金[1] 高正中[1] 张青云[1] 

机构地区：[1]四川联合大学水利工程系

出　　处：《水利学报》1998年第4期20-26,共7页Journal of Hydraulic Engineering

摘　　要：本文研究粉煤灰在不同等应力增量比路径下的应力－应变－体变特性，提出考虑土的应变软化、剪胀（剪缩）性和应力路径影响的非线性弹性模型．通过与试验及有限元计算成果对比，验证了模型的适用性．The stress\|strain\|volume variation characteristics of fly ash under different specific stress increment paths are studied. A nonlinear elastic constitutive model is suggested with the effect of strain\|softening, shear dilatancy (shrinkage) properties and stress path taken into account. The suitability of this model is verified by experimental result and FEM.\=

关 键 词：应变软化 剪胀 剪缩 本构模型 粉煤灰 土力学 

分 类 号：TU43[建筑科学—岩土工程]