Effects of Initial Defects on Effective Elastic Modulus of Concrete with Mesostructure  

作　　者：LI Xinxin DU Cheng LI Chengyu XU Yi GONG Wenping 李馨馨;龚文平

机构地区：[1]Faculty of Engineering,China University of Geosciences,Wuhan 430074,China [2]China State Construction Curtain Wall Co.,Ltd.,Wuhan 430100,China [3]Changjiang Survey Planning Design and Research Co.,Ltd.,Wuhan 430010,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第6期1484-1495,共12页武汉理工大学学报（材料科学英文版）

基　　金：Founded by the National Natural Science Foundation of China(No.42002287);the Fundamental Research Funds for the Central Universities,China University of Geosciences(Wuhan)(No.CUG2106335)。

摘　　要：An exquisite mesostructure model was presented to predict the effective elastic modulus of concrete,in which concrete is realized as a four-phase composite material consisting of coarse aggregates,mortar matrix,interfacial transition zone(ITZ),and initial defects.With the three-dimensional(3D)finite element(FE)simulation,the highly heterogeneous composite elastic behavior of concrete was modeled,and the predicted results were compared with theoretical estimations for validation.Monte Carlo(MC)simulations were performed with the proposed mesostructure model to investigate the various factors of initial defects influencing the elastic modulus of concrete,such as the shape and concentration(pore volume fraction or crack density)of microspores and microcracks.It is found that the effective elastic modulus of concrete decreases with the increase of initial defects concentration,while the distribution and shape characteristics also exert certain influences due to the stress concentration caused by irregular inclusion shape.

关 键 词：CONCRETE initial defects effective elastic modulus mesostructure model FEM 

分 类 号：TU528[建筑科学—建筑技术科学]