[1]徐亦冬,郑颖颖,杜坤,等.钢筋混凝土保护层锈裂行为的细观有限元模拟[J].东南大学学报(自然科学版),2017,47(2):356-361.[doi:10.3969/j.issn.1001-0505.2017.02.026] 　Xu Yidong,Zheng Yingying,Du Kun,et al.Meso-scale finite element simulation of corrosion-induced cracking in reinforced concrete cover[J].Journal of Southeast University (Natural Science Edition),2017,47(2):356-361.[doi:10.3969/j.issn.1001-0505.2017.02.026] 点击复制 钢筋混凝土保护层锈裂行为的细观有限元模拟() 分享到： var jiathis_config = { data_track_clickback: true };

47

2017年第2期

356-361

2017-03-20

文章信息/Info

Title:
Meso-scale finite element simulation of corrosion-induced cracking in reinforced concrete cover

1浙江大学宁波理工学院, 宁波 315100; 2杭州交通投资建设管理有限公司, 杭州 310015; 3重庆交通大学土木工程学院, 重庆 400074
Author(s):
1Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China
2Hangzhou Traffic Investment and Construction Management Co., Ltd., Hangzhou 310015, China
3School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China

Keywords:

TU503
DOI:
10.3969/j.issn.1001-0505.2017.02.026

Abstract:
To study the influence of nonuniform characteristics of concrete on the corrosion-induced concrete cover cracking, a random aggregate model was established by using the Monte Carlo method. The codes of the aggregate generation and the delivery were compiled by the Matlab software considering the influence of the interface layer. By changing the thickness of the corrosion layer, the meso-scale finite element simulation of the corrosion-induced cracking behavior caused by corrosion of steel reinforcement was conducted.The results show that the expansion of steel reinforcement corrosion product is nonuniform. The interface layer between the mortar and the aggregate is the weakest link in the corrosion process of reinforced concrete cover. When the maximum thickness of the corrosion layer is 1.24 μm, the interface layer begins to crack and then the mortar around the steel reinforcement cracks. When the maximum thickness of the corrosion layer is 9.00 μm, the cracks appear on the surface of the concrete cover and the effective corrosion ratio of steel reinforcement is only 0.186%. When the maximum thickness of the corrosion layer reaches to 18.00 μm, the cracks between the steel reinforcement in the concrete are connected, and the crack distribution pattern is similar to that of the measured corrosion cracking, indicating that the meso-scale simulation is reliable.

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