| A Calculation Model for Corrosion Cracking in RC Structures |
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| 作者姓名： | 徐港 卫军 张克强 周锡武 |
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| 作者单位： | School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China |
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| 基金项目： | This paper is supported by the National Natural Science Foundation of China （Nos. 50278039, 50538070）. |
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| 摘 要： | A novel calculation model is proposed aiming at the problem of concrete cover cracking induced by reinforcement corrosion. In this article, the relationship between the corrosion depth of the bar and the thickness of the rust layer is established. By deducing the radial displacement expression of concrete, the formula for corrosion depth and corrosion pressure before cracking is proposed. The crack depth of cover in accordance with the maximum corrosion pressure is deduced; furthermore, the corrosion depth and corrosion pressure at the cracking time are obtained. Finally, the theoretical model is validated by several experiments, and the calculated values agree well with the experiment results.
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| 关 键 词： | 钢筋混凝土结构 腐蚀裂纹 计算模型 混凝土保护层 钢筋锈蚀 |
| 收稿时间： | 2006-09-02 |
| 修稿时间： | 2006-12-10 |
A Calculation Model for Corrosion Cracking in RC Structures |
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| Xu Gang,Wei Jun,Zhang Keqiang,Zhou Xiwu.A Calculation Model for Corrosion Cracking in RC Structures[J].Journal of China University of Geosciences,2007,18(1):85-89. |
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| Authors: | Xu Gang Wei Jun Zhang Keqiang Zhou Xiwu |
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| Institution: | School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | A novel calculation model is proposed aiming at the problem of concrete cover cracking induced by reinforcement corrosion. In this article, the relationship between the corrosion depth of the bar and the thickness of the rust layer is established. By deducing the radial displacement expression of concrete, the formula for corrosion depth and corrosion pressure before cracking is proposed. The crack depth of cover in accordance with the maximum corrosion pressure is deduced; furthermore, the corrosion depth and corrosion pressure at the cracking time are obtained. Finally, the theoretical model is validated by several experiments, and the calculated values agree well with the experiment results. |
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| Keywords: | concrete cover reinforcement corrosion products corrosion pressure |
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