平面应变状态混凝土等效单轴应变本构模型研究  

Equivalent Uniaxial Constitutive Model of Concrete in Plane Strain

作　　者：汪基伟[1] 朱虹[2] 王红 

机构地区：[1]河海大学土木工程学院,江苏南京210098 [2]长江水利委员会设计院,湖北武汉430010 [3]乌江水电集团公司,贵州贵阳550000

出　　处：《河海大学学报（自然科学版）》2002年第1期6-10,共5页Journal of Hohai University(Natural Sciences)

基　　金：教育部"高等学校骨干教师资助计划"项目 ;江苏省"3 3 3工程"资助项目

摘　　要：推导了平面应变状态下的等效单轴应力 应变关系 .以应力 应变曲线试验值与计算值的误差达到最小为目标 ,反演出双向受压时相应于强度值的等效单轴应变值 ,并回归得到其计算公式 ;同时对一拉一压、双向受拉及一向开裂、双向开裂等受力状况提出了εic的计算方法 ;经对现有强度理论的分析比较 ,选择了适合平面应变状态的强度准则 ,从而得到了平面应变状态混凝土等效单轴应变本构模型 .A relation of equivalent uniaxial stress strain of concrete in plane strain is derived. Based on the minimization of difference between calculated and test results, the equivalent uniaxial strain corresponding to strength under pressures in two directions is calculated and its regression equations are given. A method is proposed for calculation of ε ic under the conditions of tension compression, tension in two directions, cracking in one direction, and cracking in two directions. After a comparison of current strength theories, a strength criterion for the plane strain state is selected, and an equivalent uniaxial constitutive model for concrete in plane strain is developed.

关 键 词：本构模型 平面应变状态 等效单轴应变 钢筋混凝土 

分 类 号：TU528.571[建筑科学—建筑技术科学]