基于能量密度支函数的混凝土宏细观屈服准则的构建  

Establishment of Macro-mesoscopic Yield Criterion of Concrete Based on Energy Density Support Function

作　　者：蒋群[1,2] 夏晓舟[1,3] 章青[2] 

机构地区：[1]河海大学土木学院,南京210098 [2]江西科技师范学院通信电子学院,南昌330013 [3]广东工业大学土木与交通工程学院,广州510006

出　　处：《三峡大学学报（自然科学版）》2009年第6期40-44,共5页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金重点项目(50679022)

摘　　要：把混凝土看作是由骨料、砂浆基体和他们之间的界面组成的复合材料,并假定骨料形状为球形且不屈服以及砂浆基体服从D-P屈服准则,通过引入能量密度支函数来反映砂浆基体的屈服面,并构造一函数逼近序列来解决屈服边界不可导的问题,最后由非线性均匀化技术推得混凝土材料的一个宏细观屈服准则的关系式,并由它探讨了界面连接状态和骨料含量对宏观摩擦系数的影响规律.The concrete is regarded as a composite material consisting of mortar matrix,aggregates and the bond between them in mesoscopic system.And the shape of aggregate is assumed to be sphere and the mortar matrix is supposed to satisfy the D-P yield criteria.The energy density support function is introduced to reflect the yield surface of mortar matrix.In order to solve the non derivability on the yield boundary,the function approaching series is constructed to substitute for the energy density function.Finally,a macro-mesoscopic yield criterion of concrete material is derived by nonlinear homogenized technique.Through this macro-mesoscopic yield criterion,the influence regularity of the bonding status of interface and the fraction of aggregate on the macro friction coefficient is explored.

关 键 词：能量密度支函数 DP屈服准则 宏细观屈服准则 非完好连接界面 

分 类 号：O34[理学—固体力学] TU501[理学—力学]