Investigation on bearing resistance of thin-walled circular steel tube subjected to eccentric loading

IF 2.1 4区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY
Zhenyun Tang, Jiayu Li, Mingqiao Wang, Xin Wang, Chunyi Yu, Zhenbao Li
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引用次数: 0

Abstract

In the engineering structures using circular steel tube (CST), the eccentric loading of CST members often occurs due to installation error and structural form. Existing research mainly focuses on the bearing resistance of circular steel pipes under the condition of eccentricity at one end. In practical application, both ends of CST members also may be eccentric. And with the increase in eccentricity, material yielding may occur prior to flexural buckling. So far, it’s lack of reports about the mechanical behavior of CST members subjected to eccentric loading at both ends and the boundary between material yielding and flexural buckling. This paper presents experimental, numerical and theoretical studies on bearing resistance of thin-walled circular steel tube with slenderness ratio of 30, 40 and 50, subjected to eccentric loading at one end and both ends, respectively. The study reveals a significant discrepancy in the prediction of bearing resistance for circular tubes subjected to eccentric loading at both ends according to existing design codes. Considering the synthesis of bending moment and deflection caused by eccentric loading at both ends, the calculation method of the bearing resistance based on flexural buckling of CST is established, which enhances the prediction accuracy of test verification. In addition, a theoretical boundary between the two failure modes appearing in CST members under eccentric loading at one and both end(s) - flexural buckling and reaching the material yielding strength - was established as dominated by the slenderness ratio and loading eccentricity.
薄壁圆钢管承受偏心荷载时的轴承阻力研究
在使用圆钢管(CST)的工程结构中,由于安装误差和结构形式的原因,圆钢管构件经常会出现偏心荷载。现有研究主要集中在圆钢管一端偏心情况下的承载阻力。在实际应用中,CST 构件的两端也可能出现偏心。而随着偏心率的增加,材料可能会在挠曲屈曲之前发生屈服。迄今为止,关于两端都承受偏心荷载的 CST 构件的力学行为以及材料屈服和挠曲屈曲之间的界限还缺乏相关报道。本文对一端和两端分别承受偏心荷载的细长比为 30、40 和 50 的薄壁圆形钢管的承载阻力进行了实验、数值和理论研究。研究结果表明,根据现有设计规范,两端承受偏心荷载的圆形钢管的承载阻力预测存在明显差异。考虑到两端偏心加载引起的弯矩和挠度的合成,建立了基于 CST 挠曲屈曲的承载阻力计算方法,提高了试验验证的预测精度。此外,还确定了 CST 构件在一端和两端偏心加载情况下出现的两种破坏模式--挠曲屈曲和达到材料屈服强度--之间的理论边界,这种边界受细长比和加载偏心率的支配。
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
Advances in Structural Engineering
Advances in Structural Engineering 工程技术-工程:土木
CiteScore
5.00
自引率
11.50%
发文量
230
审稿时长
2.3 months
期刊介绍: Advances in Structural Engineering was established in 1997 and has become one of the major peer-reviewed journals in the field of structural engineering. To better fulfil the mission of the journal, we have recently decided to launch two new features for the journal: (a) invited review papers providing an in-depth exposition of a topic of significant current interest; (b) short papers reporting truly new technologies in structural engineering.
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