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

被引：0
|
作者：
Li, Xinxin [1 ]
Du, Cheng [1 ]
Li, Chengyu [2 ]
Xu, Yi [3 ]
Gong, Wenping [1 ]
机构：
[1] China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China
[2] China State Construct Curtain Wall Co Ltd, Wuhan 430100, Peoples R China
[3] Changjiang Survey Planning Design & Res Co Ltd, Wuhan 430010, Peoples R China
来源：
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2024年 / 39卷 / 06期
基金：
中国国家自然科学基金;
关键词：
concrete; initial defects; effective elastic modulus; mesostructure model; FEM; WATER PERMEABILITY; HOMOGENIZATION; SOLIDS; BEHAVIOR; STRESS; CRACKS; MODEL;
D O I：
10.1007/s11595-024-3018-z
中图分类号：
T [工业技术];
学科分类号：
08 ;
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.
引用
收藏
页码：1484 / 1495
页数：12
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