Experimental and numerical investigation of axially loaded aluminium alloy angle struts with lateral bracing on one leg

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-11 DOI:10.1016/j.tws.2025.113310

Zhaoyu Xu , Yujia Zhang , Lei Zhang , Yafei Chen , Genshu Tong

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Abstract

This study investigates the buckling behaviour and resistance of aluminium alloy angle struts with lateral bracing on one leg. Axial compressive tests were conducted on eleven simply supported angle struts, each with one leg supported by lateral bracing. The initial geometric imperfections of the specimens were carefully measured using a 3D laser scanner. Finite element models were developed to perform a comprehensive parametric study. The sensitivity to initial imperfections was analysed in detail. The ratio of the flexural buckling load about the rectangular axis N_cr,FR to the torsional buckling load N_cr,T was found to have a significant effect on the buckling behaviour. Comparison of buckling resistance indicates that existing design codes cannot be directly applied to aluminium alloy angle struts with lateral bracing on one leg. By introducing the elastic buckling load ratio N_cr,FR / N_cr,T, the proposed new design methods demonstrated good accuracy.

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单腿侧撑轴向载荷铝合金角支撑的试验与数值研究

本文研究了单腿侧撑铝合金角杆的屈曲行为和抗屈曲性能。轴向压缩试验对11根简支角杆进行了轴向压缩试验，每根单支腿由侧支撑支撑。使用三维激光扫描仪仔细测量了样品的初始几何缺陷。开发了有限元模型来进行全面的参数研究。详细分析了该方法对初始缺陷的敏感性。矩形轴上的弯曲屈曲载荷Ncr，FR与扭转屈曲载荷Ncr，T之比对屈曲行为有显著影响。抗屈曲性能对比表明，现有设计规范不能直接适用于单支侧撑铝合金角支撑。通过引入弹性屈曲载荷比Ncr、FR / Ncr、T，提出的设计方法具有较好的精度。

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

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.