A modified numerical model for predicting carbonation depth of concrete with stress damage

被引：30
|
作者：
Shi, Xinyu [1 ]
Yao, Yan [1 ]
Wang, Ling [1 ]
Zhang, Cheng [1 ]
Ahmad, Iftikhar [2 ]
机构：
[1] China Bldg Mat Acad, State Key Lab Green Bldg Mat, Beijing 100024, Peoples R China
[2] Hebei Univ Technol, Sch Civil & Transportat Engn, Tianjin 300401, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 304卷
基金：
中国国家自然科学基金;
关键词：
Numerical simulation; Finite element method; Concrete; Carbonation; Stress damage; MOISTURE; HEAT; PENETRATION; TRANSPORT; MECHANISM; FLOW;
D O I：
10.1016/j.conbuildmat.2021.124389
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A modified carbonation model centered on humidity-temperature-CO2 coupling was proposed. Its parameters were determined based on a 3-year natural carbonation test. The model was then verified by comparing carbonation results with that of accelerated experiment (2% and 20% CO2) and other publications. The effect of coarse aggregate, crack, and carbonation direction was investigated for undamaged concrete. The influence of stress damage (calculated by ABAQUS) and evaluating method was investigated for stress damaged concrete. The results indicated that the proposed model put more weight on the stress damage. It predicted the service life decreases to 1/3 of undamaged concrete for the example in this article.
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收藏
页数：12
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