Buckling and ultimate strength criteria of stiffened shells under combined loading for reliability analysis

P.K. Das, A. Thavalingam, Y. Bai

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The work presented in this paper forms part of a broader task in establishing a guide to serve as technical documentation for buckling and ultimate strength assessment of various types of marine structural components using the best state-of-the-art knowledge for extreme environmental loading. This paper concentrates on buckling and ultimate strength assessment of ring stiffened shells and ring and stringer stiffened shells involving various modes of buckling and under various loading like axial compression, radial pressure and combined loading. Comparisons are made with screened test data, which have realistic imperfections and various radius to thickness ratio values in the range generally used in offshore structures. The statistical data of model uncertainty factors in terms of bias and coefficient of variation (COV) are calculated and may be used in a further reliability study. Comparisons are also made with the codified rules, API BUL 2U and DNV buckling strength of shells.
Original languageEnglish
Pages (from-to)69-88
Number of pages19
JournalThin-Walled Structures
Volume41
Issue number1
DOIs
Publication statusPublished - Jan 2003

Keywords

  • stiffened shells
  • structural reliability
  • offshore structure
  • ultimate strength
  • buckling

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