Ocean Systems Engineering

  • 제13권2호
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  • Pages.97-121
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  • 2023
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  • 2093-6702(pISSN)
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  • 2093-677X(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Effects of geometrical parameters on the degree of bending in two-planar tubular DYT-joints of offshore jacket structures

  • Hamid Ahmadi (Centre for Future Materials, University of Southern Queensland) ;
  • Mahdi Ghorbani (Faculty of Civil Engineering, University of Tabriz)
  • 투고 : 2023.01.10
  • 심사 : 2023.04.06
  • 발행 : 2023.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

Through-the-thickness stress distribution in a tubular member has a profound effect on the fatigue behavior of tubular joints commonly found in steel offshore structures. This stress distribution can be characterized by the degree of bending (DoB). Although multi-planar joints are an intrinsic feature of offshore tubular structures and the multi-planarity usually has a considerable effect on the DoB values at the brace-to-chord intersection, few investigations have been reported on the DoB in multi-planar joints due to the complexity of the problem and high cost involved. In the present research, data extracted from the stress analysis of 243 finite element (FE) models, verified based on available parametric equations, was used to study the effects of geometrical parameters on the DoB values in two-planar tubular DYT-joints. Parametric FE study was followed by a set of nonlinear regression analyses to develop six new DoB parametric equations for the fatigue analysis and design of axially loaded two-planar DYT-joints.

키워드

과제정보

Useful comments of anonymous reviewers on draft version of this paper are highly appreciated.

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