Effects of geometrical parameters on the degree of bending (DoB) in multiplanar tubular XT-joints of offshore structures subjected to axial loading

Ahmadi, Hamid ORCID: https://orcid.org/0000-0002-6192-6275 and Chamani, Shadi and Kouhi, Ahmad (2020) Effects of geometrical parameters on the degree of bending (DoB) in multiplanar tubular XT-joints of offshore structures subjected to axial loading. Applied Ocean Research, 104:102381. ISSN 0141-1187


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 on the DoB due to the complexity and high cost involved. In the present research, data extracted from the stress analysis of 81 finite element (FE) models, verified using available parametric equations, was used to study the effects of geometrical parameters on the DoB values in multi-planar tubular XT-joints subjected to two types of axial loading. Parametric FE study was followed by a set of the nonlinear regression analyses to develop four new DoB parametric equations for the fatigue analysis and design of axially loaded multi-planar XT-joints.


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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: 26 Jul 2022 03:23
Last Modified: 26 Jul 2022 23:40
Uncontrolled Keywords: Fatigue, Offshore jacket structure, Multi-planar tubular XT-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 > 1702 Energy exploration > 170203 Oil and gas exploration
Identification Number or DOI: https://doi.org/10.1016/j.apor.2020.102381
URI: http://eprints.usq.edu.au/id/eprint/50484

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