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

Ahmadi, Hamid ORCID: and Atalo, Adel Alizadeh (2021) Geometrical effects on the degree of bending (DoB) of multi-planar tubular KK-joints in jacket substructure of offshore wind turbines. Applied Ocean Research, 111:102678. pp. 1-14. ISSN 0141-1187


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.

Statistics for USQ ePrint 50507
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 28 Jul 2022 03:52
Last Modified: 01 Aug 2022 03:54
Uncontrolled Keywords: Fatigue, Offshore wind turbine (OWT), Jacket substructure, Multi-planar tubular KK-joint, Degree of bending (DoB)
Fields of Research (2020): 40 ENGINEERING > 4015 Maritime engineering > 401504 Ship and platform structures (incl. maritime hydrodynamics)
40 ENGINEERING > 4005 Civil engineering > 400510 Structural engineering
Socio-Economic Objectives (2020): 17 ENERGY > 1708 Renewable energy > 170808 Wind energy
Identification Number or DOI:

Actions (login required)

View Item Archive Repository Staff Only