A reliability-based methodology for considering corrosion effects on fatigue deterioration in steel bridges - Part I: Methodology

It is known that the effects of corrosion on fatigue originate from two major sources: stress concentration due to corrosion discontinuities ( CNF factor) and stress amplification due to loosing net section ( NAF factor). In order to account for these effects, a performance function is developed whi...

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Bibliographic Details
Published in:International journal of steel structures 2013, 13(4), , pp.645-656
Main Authors: Hosseini, Abdollah, Sahrapeyma, Ali, Marefat, Mohammad-S
Format: Article
Language:English
Subjects:
Civil Engineering
Engineering
Materials Science
Solid Mechanics
토목공학
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Summary:It is known that the effects of corrosion on fatigue originate from two major sources: stress concentration due to corrosion discontinuities ( CNF factor) and stress amplification due to loosing net section ( NAF factor). In order to account for these effects, a performance function is developed which takes CNF and NAF factors into account and considers both random and time-dependent nature of the involved parameters. In order to consider real fatigue and environmental conditions, the available CNF-y and y-t functions are extended employing α and φ factors, respectively. In addition, some recommendations have been made to establish corrosion pattern of different steel sections. The final output of the methodology is development of a reliability-based procedure to establish time-dependent deterioration profile of a structural member, which assists in decision-making with regard to maintenance activities. The proposed methodology has been applied to Neka Bridge, a railway bridge in northern Iran, which is presented in Part II.
ISSN:1598-2351
2093-6311
DOI:10.1007/s13296-013-4006-x