A macro-meso constitutive law for concrete having imperfect interface and nonlinear matrix

作     者：ZHANG Qing1 & XIA XiaoZhou1,2 1 Department of Engineering Mechanics,Hohai University,Nanjing 210098,China 2 Institute of Construct,Guangdong University of Technology,Guangzhou 510006,China 

出 版 物：《中国科学:技术科学》 (Scientia Sinica(Technologica))

年 卷 期：2010年第3期

页      面：330-330页

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos.50679022,90510017,50539090) National Basic Research Program of China (Grant No.2007CB714104) 

主　　题：imperfect interface matrix nonlinear property variational structure principle macro-meso constitutive law concrete 

摘      要：The overall behavior of concrete depends on its meso structures such as aggregate shape,interface status,and mortar matrix *** two key meso structure characters of concrete,bond status of interface and nonlinear property of matrix,are considered in *** variational structure principle is adopted to establish the macro-meso constitutive law of ***,a linear reference composite material is selected to make its effective behavior approach the nonlinear overall behavior of *** the overall property of linear reference composite can be estimated by classical estimation method such as self-consistent estimates method and Mori-Tanaka *** variational structure method involves an optimum problem ***,the macro-meso constitutive law of concrete is established by optimizing the shear modulus of matrix of the linear reference *** analyzing the constitutive relation of concrete established,we find that the brittleness of concrete stems from the imperfect interface and the shear dilation property of concrete comes from the micro holes contained in concrete.