Collar plate effect on local joint flexibility of tubular K-joints under IPB moments: Parametric study and predictive equations

IF 4 2区工程技术 Q1 ENGINEERING, CIVIL Marine Structures Pub Date : 2024-07-25 DOI:10.1016/j.marstruc.2024.103676

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Abstract

This study delves into the Local Joint Flexibility (LJF) of tubular K-joints reinforced with the collar plates under in-plane bending moments (IPBMs). 348 reinforced K-joints were simulated to analyze the impacts of the loading conditions (balanced and unbalanced moments), collar plate size (like the length and thickness) alongside the joints’ parameters (θ, γ, β, ξ) on the f_LJF and its proportionality (ψ). The research outcomes demonstrate that factors such as η, λ, and β play a significant role in determining ψ, whereas the influence of ξ, and γ on ψ appears to be negligible. Also, in the reinforced joints, the f_LJF is decreased by 77.4 % compared to the equivalent un-reinforced joint. While the role of the collar plate on the f_LJF is remarkable, the matter had not been investigated on K-joints. Therefore, following the detailed parametric study, two novel equations are proposed to safety estimate the f_LJF for such scenarios.

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领板对 IPB 力矩下管状 K 型关节局部柔韧性的影响：参数研究和预测方程

本研究深入探讨了在平面弯曲力矩（IPBMs）作用下，使用领圈板加固的管状 K 形接头的局部接头挠度（LJF）。模拟了 348 个加固 K 型接头，分析了加载条件（平衡和不平衡力矩）、领板尺寸（如长度和厚度）以及接头参数（θ、γ、β、ξ）对 fLJF 及其比例关系（ψ）的影响。研究结果表明，η、λ 和 β 等因素对决定 ψ 起着重要作用，而 ξ 和 γ 对 ψ 的影响似乎可以忽略不计。此外，与等效的未加固接头相比，加固接头的 fLJF 降低了 77.4%。虽然领圈板对 fLJF 的作用非常显著，但这一问题尚未在 K 型接头中得到研究。因此，在详细的参数研究之后，我们提出了两个新方程，用于安全估算此类情况下的 fLJF。

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来源期刊

Marine Structures 工程技术-工程：海洋

CiteScore

8.70

自引率

7.70%

发文量

157

审稿时长

6.4 months

期刊介绍： This journal aims to provide a medium for presentation and discussion of the latest developments in research, design, fabrication and in-service experience relating to marine structures, i.e., all structures of steel, concrete, light alloy or composite construction having an interface with the sea, including ships, fixed and mobile offshore platforms, submarine and submersibles, pipelines, subsea systems for shallow and deep ocean operations and coastal structures such as piers.