Parametric study and formulation of SCFs in axially loaded multiplanar tubular XT-joints reinforced with internal ring stiffeners

Ahmadi, Hamid ORCID: https://orcid.org/0000-0002-6192-6275 and Kouhi, Ahmad (2021) Parametric study and formulation of SCFs in axially loaded multiplanar tubular XT-joints reinforced with internal ring stiffeners. Journal of Civil and Environmental Engineering.


Abstract

The majority of tubular joints commonly found in offshore jacket structures are multi-planar. Investigating the effect of loaded out-of-plane braces on the values of the stress concentration factor (SCF) in offshore tubular joints has been the objective of numerous research works. However, due to the diversity of joint types and loading conditions, a number of quite important cases still exist that have not been studied thoroughly. Among them are internally ring-stiffened multi-planar XT-joints subjected to axial loading. In the present research, data extracted from the stress analysis of 81 finite element (FE) models, verified using experimental test results, was used to study the effects of geometrical parameters on the chord-side SCFs in multi-planar tubular XT-joints reinforced with internal ring stiffeners subjected to two types of axial loading. Parametric FE study was followed by a set of the nonlinear regression analyses to develop four new SCF parametric equations for the fatigue analysis and design of axially-loaded multi-planar XT-joints reinforced with internal ring stiffeners.


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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 05:26
Last Modified: 01 Aug 2022 04:01
Uncontrolled Keywords: Fatigue Stress concentration factor (SCF), Offshore jacket structure, Multi-planar tubular XT-joint, Internal ring stiffener
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.2021.42052.1968
URI: http://eprints.usq.edu.au/id/eprint/50524

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