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  • Geometrical effects on the degree of bending (DoB) of multi-planar tubular KK-joints in jacket substructure of offshore wind turbines

    Author(s)
    Ahmadi, H
    Alizadeh Atalo, A
    Griffith University Author(s)
    Ahmadi, Hamid
    Year published
    2021
    Metadata
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    Abstract
    The degree of bending (DoB) characterizes the member through-the-thickness stress distribution which has a profound effect on the fatigue behavior of tubular joints commonly found in steel offshore structures and the determination of DoB values is essential for improving the accuracy of fatigue life estimation. Multi-planar joints are an intrinsic feature of offshore tubular structures and the multi-planarity might have a considerable effect on the DoB values at the brace-to-chord intersection. Nevertheless, for multi-planar joints which cover the majority of practical applications, much fewer investigations have been reported ...
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    The degree of bending (DoB) characterizes the member through-the-thickness stress distribution which has a profound effect on the fatigue behavior of tubular joints commonly found in steel offshore structures and the determination of DoB values is essential for improving the accuracy of fatigue life estimation. Multi-planar joints are an intrinsic feature of offshore tubular structures and the multi-planarity might have a considerable effect on the DoB values at the brace-to-chord intersection. Nevertheless, for multi-planar joints which cover the majority of practical applications, much fewer investigations have been reported on the DoB due to the complexity 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 multi-planar tubular KK-joints which are among the most common joint types in jacket substructure of offshore wind turbines (OWTs). Parametric FE study was followed by a set of nonlinear regression analyses to develop three new DoB parametric equations for the fatigue analysis and design of axially loaded multi-planar KK-joints.
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    Journal Title
    Applied Ocean Research
    Volume
    111
    DOI
    https://doi.org/10.1016/j.apor.2021.102678
    Subject
    Civil engineering
    Physical oceanography
    Resources engineering and extractive metallurgy
    Publication URI
    http://hdl.handle.net/10072/412457
    Collection
    • Journal articles

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