Ocean Systems Engineering

  • 제4권2호
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  • Pages.151-167
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  • 2014
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  • 2093-6702(pISSN)
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  • 2093-677X(eISSN)
테크노프레스 (Techno-Press)
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Local joint flexibility equations for Y-T and K-type tubular joints

  • Asgarian, Behrouz (K.N.Toosi University of Technology, Faculty of Civil Engineering) ;
  • Mokarram, Vahid (K.N.Toosi University of Technology, Faculty of Civil Engineering) ;
  • Alanjari, Pejman (K.N.Toosi University of Technology, Faculty of Civil Engineering)
  • 투고 : 2013.08.04
  • 심사 : 2014.06.08
  • 발행 : 2014.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

It is common that analyses of offshore platforms being carried out with the assumption of rigid tubular joints. However, many researches have concluded that it is necessary that local joint flexibility (LJF) of tubular joints should be taken into account. Meanwhile, advanced analysis of old offshore platforms considering local joint flexibility leads to more accurate results. This paper presents an extensive finite-element (FE) based study on the flexibility of uni-planner multi-brace tubular Y-T and K-joints commonly found in offshore platforms. A wide range of geometric parameters of Y-T and K-joints in offshore practice is covered to generate reliable parametric equations for flexibility matrices. The formulas are obtained by non-linear regression analyses on the database. The proposed equations are verified against existing analytical and experimental formulations. The equations can be used reliably in global analyses of offshore structures to account for the LJF effects on overall behavior of the structure.

키워드

참고문헌

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피인용 문헌

  1. Structural joint modeling and identification: numerical and experimental investigation vol.53, pp.2, 2015, https://doi.org/10.12989/sem.2015.53.2.373
  2. Three-dimensional joint flexibility element for modeling of tubular offshore connections vol.20, pp.4, 2015, https://doi.org/10.1007/s00773-015-0317-2
  3. Improved LJF equations for the uni-planar gapped K-type tubular joints of ageing fixed steel offshore platforms 2017, https://doi.org/10.1080/20464177.2017.1299613
  4. Static behavior of steel tubular structures considering local joint flexibility vol.24, pp.4, 2014, https://doi.org/10.12989/scs.2017.24.4.425
  5. Simplified bar-system model for tubular structures by considering local joint flexibility vol.81, pp.None, 2022, https://doi.org/10.1016/j.marstruc.2021.103122