Probabilistic Models for Corrosion in Structural Reliability Assessment—Part 1: Empirical Models

[+] Author and Article Information
Robert E. Melchers

Centre for Infrastructure Performance and Reliability, Department of Civil, Surveying and Environmental Engineering, The University of Newcastle, Australia 2308e-mail: Rob.Melchers@newcastle.edu.au

J. Offshore Mech. Arct. Eng 125(4), 264-271 (Oct 01, 2003) (8 pages) doi:10.1115/1.1600467 History: Received January 09, 2002; Revised January 01, 2003; Online October 01, 2003
Copyright © 2003 by ASME
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Effect of strength deterioration on failure probability estimate (schematic)
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Realization of a continuous random load process and a potential exceedence of the deteriorating structural resistance R(t)
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Typically observed corrosion rates, large-showing scatter (based on 20)
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Typical corrosion rates for tanker ships. Notation: x (y)/z: x=mean rate of corrosion in mm/year for plate and stiffener flange, y=ditto for web stiffener web, z=coefficient of variation.
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Variation in wastage of a steel plate with increased length of exposure (schematic)
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Localized corrosion at weld heat-affected zone (HAZ) between stiffener and plate
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Compilation of immersion corrosion data from all available data sources to 1994 with 5 and 95 percentile bands 26
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Collected data for splash-zone corrosion data corrected for temperature with 5 and 95 percentile bands 26
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Relationship between structural and coupon (specimen) corrosion.




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