Uniform and Pitting Corrosion Modeling for High-Strength Bridge Wires
Publication: Journal of Bridge Engineering
Volume 19, Issue 7
Abstract
Cable inspections revealed that severe corrosion of steel wires is one of the main failure mechanisms of cables. Accelerated corrosion experiments were conducted to evaluate the variation in the uniform and pitting corrosion depths of high-strength steel wires over time. The measured uniform corrosion depth followed a lognormal distribution with time-dependent corrosion variables at both the zinc coating corrosion stage and the steel corrosion stage. The block’s maximum pitting factors from a different exposure time were proven to be drawn from the same underlying continuous population and followed Gumbel distribution. The regression models of the scale and location parameter with increased surface area were obtained based on the experimental block’s maximum pitting factors. The extreme value distribution of the pit depth of corroding steel wires could be predicted by the developed statistical uniform and pitting factor models.
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Acknowledgments
Financial support for this study was provided by National Natural Science Foundation of China (NSFC) (Grant No. 51008096), Ministry of Science and Technology of the People's Republic of China (MOST) (Grant No. 2011BAK02B02 and 2011CB013604) and the Fundamental Research Funds for the Central Universities (Grant No. HIT. NSRIF. 2013075).
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Published In
Journal of Bridge Engineering
Volume 19 • Issue 7 • July 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jun 19, 2013
Accepted: Dec 30, 2013
Published online: Feb 3, 2014
Published in print: Jul 1, 2014
Discussion open until: Jul 3, 2014
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