Buckling capacity of steel circular hollow section considering the restraint of welded hollow spherical joints

Q1 Arts and Humanities

International Journal of Space Structures Pub Date : 2023-05-11 DOI:10.1177/09560599231167012

Lin Qi, Xiangnan Shi, Yongcheng Huai, Wenbo Zhang, Fengqing Mei, Long Qiao, Zibo Liang

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引用次数: 0

Abstract

An integral finite element model of steel circular hollow section and welded hollow spherical joints is established to consider the restraint of welded hollow spherical joints on steel circular hollow section in this paper. The buckling modes are used as the initial geometrical imperfection forms of the steel circular hollow section. Based on the statistics method, a method for calculating the buckling capacity design value of the steel circular hollow section with uniform reliability considering the restraint of welded hollow spherical joints is established, and the formula for calculating error of this value at certain confidence is deduced. The relationships between the buckling capacity design value of steel circular hollow section and the structural parameters of the member and joint are determined quantitatively by linear regression method. A practical formula for the buckling capacity design value of steel circular hollow section considering the restraint of welded hollow spherical joints is derived. Compared to the results calculated by the design code indicates that if the difference of restraint effect which is caused by different welded hollow spherical joint is ignored, the buckling capacity value of steel circular hollow section calculated based on the unified effective length coefficient may be bigger or smaller than that of the actual case. Therefore, refined consideration should be placed on the different restraint of welded hollow spherical joints of different sizes on steel circular hollow section, and the restraint of the end joints should be accurately considered when determining the buckling capacity of steel circular hollow sections.

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考虑焊接空心球节点约束的钢制圆形空心截面的屈曲能力

为了考虑焊接空心球节点对圆形空心截面的约束，建立了圆形空心截面和焊接空心球接头的整体有限元模型。屈曲模式被用作钢圆形空心截面的初始几何缺陷形式。基于统计学方法，建立了考虑焊接空心球节点约束的具有均匀可靠度的钢制圆形空心截面屈曲承载力设计值的计算方法，并推导了该值在一定置信度下的误差计算公式。采用线性回归方法，定量地确定了钢制圆形空心截面的屈曲承载力设计值与构件和节点的结构参数之间的关系。推导了考虑焊接空心球节点约束的钢制圆形空心截面屈曲承载力设计值的实用公式。与设计规范计算结果比较表明，如果忽略不同焊接空心球节点引起的约束效果差异，基于统一有效长度系数计算的钢制圆形空心截面的屈曲承载力值可能大于或小于实际情况。因此，应仔细考虑不同尺寸的焊接空心球形接头对钢制圆形空心截面的不同约束，在确定钢制圆形中空截面的屈曲能力时，应准确考虑端部接头的约束。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Space Structures Arts and Humanities-Conservation

CiteScore

2.00

自引率

0.00%

发文量

期刊介绍： The aim of the journal is to provide an international forum for the interchange of information on all aspects of analysis, design and construction of space structures. The scope of the journal encompasses structures such as single-, double- and multi-layer grids, barrel vaults, domes, towers, folded plates, radar dishes, tensegrity structures, stressed skin assemblies, foldable structures, pneumatic systems and cable arrangements. No limitation on the type of material is imposed and the scope includes structures constructed in steel, aluminium, timber, concrete, plastics, paperboard and fabric.