| Civil and Hydraulic Engineering Calculation of corrosion rate for reinforced concrete beams based on corrosive crack width简 |
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| 引用本文： | Feng WU,Jing-hai GONG,Zhang ZHANG. Civil and Hydraulic Engineering Calculation of corrosion rate for reinforced concrete beams based on corrosive crack width简[J]. 浙江大学学报(A卷英文版), 2014, 15(3): 197-207. DOI: 10.1631/jzus.A1300280 |
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| 作者姓名： | Feng WU Jing-hai GONG Zhang ZHANG |
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| 基金项目： | Projcct supported by thc Wcstcm Transportation Construction Sci- cncc ＆ Tcchnology Program, Ministry of Transport of China （No. 20! 332849A090） |
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| 摘 要： | This paper deals with a correction method for corrosive crack width caused by non-uniform corrosion. Considering the corrosion cracking characteristics of a reinforced concrete structure, a correction model of corrosive crack width involving the mutual impacts between adjacent measuring points is established. The calculation model for steel bar corrosion rate for single point is obtained through quantitative analysis and accelerated corrosion tests on more than 70 reinforced cubic members. Two methods are suggested by combining two models, the correction and the corrosion calculation ones. Electrolyte accelerated cor- rosion tests on seven beams are carried out to verify these methods. The experimental results show that the ratio between the maximum corrosion rate by the indirect method and the measured average value ranges from 1.4 to 2.4, and the indirect method is shown to be an effective method for calculating the maximum corrosion rate.
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| 关 键 词： | Corrosive crack width Non-uniform corrosion Corrosion rate Electrolyte accelerated corrosion test Reinforced cubic beams |
Calculation of corrosion rate for reinforced concrete beams based on corrosive crack width |
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| Feng Wu,Jing-hai Gong,Zhang Zhang. Calculation of corrosion rate for reinforced concrete beams based on corrosive crack width[J]. Journal of Zhejiang University Science, 2014, 15(3): 197-207. DOI: 10.1631/jzus.A1300280 |
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| Authors: | Feng Wu Jing-hai Gong Zhang Zhang |
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| Affiliation: | 1. Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
2. Shanghai Third Harbour Engineering Science & Technology Research Institute Co., Ltd., Shanghai, 200032, China
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| Abstract: | This paper deals with a correction method for corrosive crack width caused by non-uniform corrosion. Considering the corrosion cracking characteristics of a reinforced concrete structure, a correction model of corrosive crack width involving the mutual impacts between adjacent measuring points is established. The calculation model for steel bar corrosion rate for single point is obtained through quantitative analysis and accelerated corrosion tests on more than 70 reinforced cubic members. Two methods are suggested by combining two models, the correction and the corrosion calculation ones. Electrolyte accelerated corrosion tests on seven beams are carried out to verify these methods. The experimental results show that the ratio between the maximum corrosion rate by the indirect method and the measured average value ranges from 1.4 to 2.4, and the indirect method is shown to be an effective method for calculating the maximum corrosion rate. |
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