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

被引：3

作者：

Ahmadi H. ^{[1
,2
]}

Chamani S. ^{[1
]}

Kouhi A. ^{[1
]}

机构：

[1] Faculty of Civil Engineering, University of Tabriz, Tabriz

[2] Center of Excellence in Hydroinformatics, Faculty of Civil Engineering, University of Tabriz, Tabriz

来源：

Applied Ocean Research | 2020年 / 104卷

关键词：

Degree of bending (DoB); Fatigue; Multi-planar tubular XT-joint; Offshore jacket structure;

D O I：

10.1016/j.apor.2020.102381

中图分类号：

学科分类号：

摘要：

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. © 2020 Elsevier Ltd

引用

共 41 条

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