STUDY ON PROBABILITY DISTRIBUTION MODEL OF THE RATIO BETWEEN MAXIMUM PIT DEPTH AND AVERAGE CORROSION PENETRATION DEPTH FOR REINFORCEMENT BARS IN CONCRETE

Wang Qing; Xu Gang; Wei Jun; Lui Defu

doi:10.13204/j.gyjz201105009

Volume 41 Issue 5

Dec. 2014

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Wang Qing, Xu Gang, Wei Jun, Lui Defu. STUDY ON PROBABILITY DISTRIBUTION MODEL OF THE RATIO BETWEEN MAXIMUM PIT DEPTH AND AVERAGE CORROSION PENETRATION DEPTH FOR REINFORCEMENT BARS IN CONCRETE[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(5): 39-42,133. doi: 10.13204/j.gyjz201105009

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STUDY ON PROBABILITY DISTRIBUTION MODEL OF THE RATIO BETWEEN MAXIMUM PIT DEPTH AND AVERAGE CORROSION PENETRATION DEPTH FOR REINFORCEMENT BARS IN CONCRETE

doi: 10.13204/j.gyjz201105009

1.
1. School of Civil Engineering and Architecture,Central South University,Changsha 410075,China;
2.
2. College of Civil Engineering and Architecture,China Three Gorges University,Yichang 443002,China

Received Date: 2010-04-25
Publish Date: 2011-05-20

Abstract

Abstract

It is the necessary premise of reliability evaluation on the corroded RC member to study the distribution rule of pit corrosion for the rebar.The wet-dry cycle tests outdoors on salt-doped reinforced concrete members were conducted for two years.The 89 corroded rebars were peeled, acid cleaned, weighed, measured and analyzed.Then, the ratio of the maximum pit depth and the average corrosion penetration depth was calculated.As the analysis index of the rebar corrosion character, whose probability distribution was analyzed deeply by the method of mathematical statistics.The result shows that the ratio follows lognormal distribution for the rebar under chloride environment.
- corroded rebar,
- maximum pit depth,
- average corrosion penetration depth,
- probability distribution,
- log normal distribution

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References(7)

References

Hawn D E. Extreme Value Prediction of Maximum Pits on?Pipelines[J]. Materials Performance,1977,16(3):29-32.

[2] 马亚丽.氯离子环境下钢筋最大腐蚀深度分布规律研究[J].四川建筑科学研究,2007,35(1):98-100.

[3] Torres-Acosta A A, Martinez-Madrid M. Residual Life Corroding?Reinforced Concrete Structures in Marine Environmen[J]. Journal?of Materials in Civil Engineering, ASCE,2003,15(4):344-353.

[4] 马亚丽,张铁林.氯离子环境下钢筋最大腐蚀深度与平均腐蚀深度比值的概率分布研究[J].工业建筑,2005,35(12):11-14.

[5] Stewart, M G Harthy A A. Pitting Corrosion and Structural?Reliability of Corroding RC Structures: Experimental Data and?probabilistic analysis [J]. Reliability Engineering System?Safety,2008,93:373-382.

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沈阳化工大学材料科学与工程学院沈阳 110142

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