Effect of concrete cracks on the corrosion of headed studs in steel and concrete composite structures

被引：23
|
作者：
Xu, Xiaoqing [1 ]
He, Dongyang [2 ]
Zeng, Shanwen [2 ]
He, Wei [3 ]
Tan, Hongmei [2 ]
Yu, Zhiwei [4 ]
机构：
[1] Tongji Univ, Coll Civil Engn, Shanghai 200092, Peoples R China
[2] Chongqing Jiaotong Univ, Sch Civil Engn, Chongqing 400045, Peoples R China
[3] Sichuan Coll Architectural Technol, Deyang 618000, Peoples R China
[4] Chongqing Univ, Sch Civil Engn, Chongqing 400045, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 293卷 / 293期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Corrosion; Crack; Chloride; Headed stud; Diffusion; Electric field; FATIGUE BEHAVIOR; PREDICTION; REINFORCEMENT; RESISTANCE; TIME;
D O I：
10.1016/j.conbuildmat.2021.123440
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Corrosion of headed studs leads to the degradation of mechanical properties of shear connectors and thus decreases the durability of steel and concrete composite structures. The effect of concrete cracks on stud corrosion was investigated in this study. Accelerated corrosion tests on headed stud shear connectors and numerical simulation on chloride migration were presented. 3D corrosion morphologies of headed studs in concrete slabs with different concrete cover thicknesses and crack widths and depths were precisely measured by using an optical surface measurement technique. The results show that there was highly localized corrosion in the stud head, and cracks had significant effect on the corrosion distribution. Then, after finite element models for chloride migration were verified by experimental results, a parametric study was carried out. It was found that in concrete slab with higher crack depth, chloride concentration around the headed stud increased more rapidly, while the crack width had slight effect on the distribution of chloride concentration. Moreover, the length of the chloride transport path was found to be a significant parameter that affect the stud corrosion. (c) 2021 Elsevier Ltd. All rights reserved.
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页数：11
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