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CLC number: TU375.1

On-line Access: 2014-03-04

Received: 2013-05-12

Revision Accepted: 2013-10-25

Crosschecked: 2014-02-20

Cited: 2

Clicked: 5706

Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2014 Vol.15 No.3 P.197-207

http://doi.org/10.1631/jzus.A1300280


Calculation of corrosion rate for reinforced concrete beams based on corrosive crack width*


Author(s):  Feng Wu1,2, Jing-hai Gong1, Zhang Zhang2

Affiliation(s):  1. Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; more

Corresponding email(s):   powernovel@163.com

Key Words:  Corrosive crack width, Non-uniform corrosion, Corrosion rate, Electrolyte accelerated corrosion test, Reinforced cubic beams


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 A, 2014, 15(3): 197-207.

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author="Feng Wu, Jing-hai Gong, Zhang Zhang",
journal="Journal of Zhejiang University Science A",
volume="15",
number="3",
pages="197-207",
year="2014",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1300280"
}

%0 Journal Article
%T Calculation of corrosion rate for reinforced concrete beams based on corrosive crack width
%A Feng Wu
%A Jing-hai Gong
%A Zhang Zhang
%J Journal of Zhejiang University SCIENCE A
%V 15
%N 3
%P 197-207
%@ 1673-565X
%D 2014
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1300280

TY - JOUR
T1 - Calculation of corrosion rate for reinforced concrete beams based on corrosive crack width
A1 - Feng Wu
A1 - Jing-hai Gong
A1 - Zhang Zhang
J0 - Journal of Zhejiang University Science A
VL - 15
IS - 3
SP - 197
EP - 207
%@ 1673-565X
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1300280


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.

钢筋混凝土梁基于锈胀裂缝的锈蚀率计算

研究目的:为了解决不均匀锈蚀情况下钢筋锈蚀率的计算问题,实现锈胀开裂构件的锈蚀率无损检测,采用理论分析和试验研究相结合的方法,建立锈蚀梁钢筋最大锈蚀率的计算模型。
创新要点:考虑了邻近位置混凝土开裂的影响,基于理论分析建立了不同位置的锈胀裂缝宽度修正模型。
研究方法:首先通过理论分析建立考虑相邻测点相互影响的锈胀裂缝宽度修正模型,然后根据锈蚀物体积膨胀几何模型,建立基于锈胀裂缝宽度的锈蚀率计算公式,最后通过七根锈蚀梁的加速锈蚀试验验证了模型的准确性。
重要结论:根据对开裂后钢筋与锈蚀物膨胀体积的量化分析,锈胀裂缝宽度与钢筋锈蚀率近似呈线性变化。电解液加速腐蚀试验结果表明,提出的锈蚀率计算方法得到的最大锈蚀率与实际平均值的比值在1.4–2.4之间,与实际情况符合较好。

关键词:不均匀锈蚀;梁;锈胀裂缝宽度;锈蚀率

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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