Axial compressive behaviour and design of concrete-filled wire arc additively manufactured steel tubes

IF 3.9 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2024-10-26 DOI:10.1016/j.istruc.2024.107495

Ju Chen , Sha-Sha Song , Jun Ye , Guan Quan , Pinelopi Kyvelou , Leroy Gardner

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引用次数: 0

Abstract

The axial compressive behaviour of concrete-filled wire arc additively manufactured (WAAM) steel tubular columns is investigated experimentally in this paper. Firstly, the manufacture of a series of WAAM steel plates and tubes is described. The results of tensile testing performed on coupons cut from the WAAM plates, to obtain the mechanical properties of the printed material, are summarised. 3D laser scanning was employed to generate digital models and to capture the geometric features of the WAAM steel test specimens. Concrete was then cast into the WAAM steel tubes, creating a total of nine concrete-filled steel tubular (CFST) specimens of different diameters, thicknesses and lengths that were subjected to compressive loading. The axial compressive load-deformation responses and ultimate loads of the specimens were obtained and the influence of the as-built surface undulations of the WAAM sections was assessed. Comparisons of the test results against existing structural design provisions highlight the need to consider the influence of the weakening effect of the geometric undulations that are inherent to the WAAM process on the structural response of CFST sections, in order to achieve safe-sided strength predictions.

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混凝土填充钢丝电弧快速成型钢管的轴向抗压性能与设计

本文通过实验研究了混凝土填充钢丝电弧快速成型（WAAM）钢管柱的轴向抗压性能。首先，介绍了一系列 WAAM 钢板和钢管的制造过程。为了获得打印材料的机械性能，本文总结了从 WAAM 钢板上切割下来的试样进行拉伸测试的结果。采用三维激光扫描技术生成数字模型，并捕捉 WAAM 钢试样的几何特征。然后将混凝土浇注到 WAAM 钢管中，总共制作了九个不同直径、厚度和长度的混凝土填充钢管 (CFST) 试样，并对其施加压缩载荷。获得了试样的轴向压缩载荷-变形响应和极限载荷，并评估了 WAAM 截面的竣工表面起伏的影响。将测试结果与现有的结构设计规定进行比较，突出表明需要考虑 WAAM 工艺固有的几何起伏对 CFST 截面结构响应的削弱效应的影响，以实现安全的强度预测。

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

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.