Evaluation of the Structural Reliability of a Fixed Offshore Structure over Time

Gerardo Varela, Dante Tolentino

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

In this paper, a structural reliability assessment of a structural offshore considering the effect of the cumulative damage caused by fatigue at the end of an instant of time is presented. The reliability is expressed in terms of the confidence factor. The confidence factor is obtained for three kinds of approaches: a) without damage, b) the structural capacity is reduced over time and c) the structural capacity and demand vary over time. The uncertainties related to the occurrence of operational and storms loadings as well as epistemic uncertainties are considering. A fixed offshore jacket platform located in the Gulf of Mexico is used to estimate the reliability indicators. The structural demand and capacity are evaluated by considering operational and storm conditions. The damage is defined by the crack growth in tubular members due to fatigue. Undesirable reliability levels are obtained after 9 years of the offshore construction. The evaluation of the structural reliability levels helps to make decisions about design o re-design the structural system.

Original languageEnglish
Title of host publicationProceedings of the 7th World Congress on Civil, Structural, and Environmental Engineering, CSEE 2022
EditorsHany El Naggar, Joaquim Barros, Paulo Cachim
PublisherAvestia Publishing
ISBN (Print)9781927877999
DOIs
StatePublished - 2022
Externally publishedYes
Event7th World Congress on Civil, Structural, and Environmental Engineering, CSEE 2022 - Virtual, Online
Duration: 10 Apr 202212 Apr 2022

Publication series

NameWorld Congress on Civil, Structural, and Environmental Engineering
ISSN (Electronic)2371-5294

Conference

Conference7th World Congress on Civil, Structural, and Environmental Engineering, CSEE 2022
CityVirtual, Online
Period10/04/2212/04/22

Keywords

  • Confidence factor
  • cumulative damage
  • fatigue
  • fixed offshore jacket platform
  • reliability

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