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논문 기본 정보

자료유형
학술저널
저자정보
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)
저널정보
테크노프레스 Ocean systems engineering Ocean systems engineering 제4권 제2호
발행연도
2014.1
수록면
151 - 167 (17page)

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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.

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