SCF distribution along the weld toe in tubular X-joints reinforced with doubler plates subjected to axial loading: Study of geometrical effects and design formulation

Ahmadi, Hamid ORCID: https://orcid.org/0000-0002-6192-6275 and Khavaninzadeh, Mohammad Hasan (2021) SCF distribution along the weld toe in tubular X-joints reinforced with doubler plates subjected to axial loading: Study of geometrical effects and design formulation. Journal of Civil and Environmental Engineering.


Abstract

Although tubular X-joints are quite common in offshore structural design and despite the crucial role of stress concentration factors (SCFs) in evaluating the fatigue performance of tubular joints, the SCF distribution in X-joints reinforced with doubler plates has not been investigated so far and no design equation is currently available to predict the distribution of chord-side SCFs along the weld toe of brace-to-chord intersection in this type of joint. In the present research, data extracted from the stress analysis of 81 finite element (FE) models, verified using available numerical results, was used to study the effects of geometrical parameters on the chord-side SCF distribution along the weld toe in doubler-plate reinforced tubular X-joints subjected to axial loading. Parametric FE study was followed by a set of nonlinear regression analyses to develop a new SCF parametric equation for the fatigue analysis and design of axially loaded tubular X-joints reinforced with doubler plates.


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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: 28 Jul 2022 05:23
Last Modified: 01 Aug 2022 04:02
Uncontrolled Keywords: Fatigue, Offshore jacket structure, Tubular X-joint, Doubler plate, Stress concentration factor (SCF), Parametric design equation
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: doi:10.22034/JCEE.2021.48015.2073
URI: http://eprints.usq.edu.au/id/eprint/50526

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