A numerical study on the ultimate load of offshore two-planar tubular TT-joints reinforced with internal ring stiffeners at fire-induced elevated temperatures

Azari-Dodaran, Neda and Ahmadi, Hamid ORCID: https://orcid.org/0000-0002-6192-6275 (2021) A numerical study on the ultimate load of offshore two-planar tubular TT-joints reinforced with internal ring stiffeners at fire-induced elevated temperatures. Ocean Engineering, 230:108797. pp. 1-15. ISSN 0029-8018


Abstract

The fire resistance of internally ring-stiffened multi-planar tubular TT-joints was studied and formulated in the present paper. TT-joints were examined under axial loading. After developing a finite element (FE) model and its verification against the experimental data, a total of 324 numerical analyses were performed on 81 FE models of internally ring-stiffened multi-planar TT-joints at four different temperatures (20, 400, 550, and 700 °C) subjected to axial loading. The reinforcing effect of internal rings was investigated. Results showed that the resistance enhancement coefficient (Rs) increases by increasing the γ; while it decreases by increasing the β. Results of the parametric investigation were utilized to establish a new set of design equations to determine the bearing capacity of internally ring-stiffened multi-tubular TT-joints subjected to brace axial loads at fire-induced elevated temperatures.


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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 03:47
Last Modified: 26 Jul 2022 23:48
Uncontrolled Keywords: Ultimate capacity, Parametric design equation, Internal ring stiffener, Multi-planar circular hollow section TT-Joint, Compressive load, Fire resistance
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
40 ENGINEERING > 4005 Civil engineering > 400507 Fire safety 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.oceaneng.2021.108797
URI: http://eprints.usq.edu.au/id/eprint/50486

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