建筑结构学报2024，Vol.45Issue(4)：120-130,11.DOI:10.14006/j.jzjgxb.2023.A114
电弧增材制造不锈钢圆管短柱的几何特性和轴压性能
Geometrical characteristics and axial compression performance of stainless steel tubular stub columns fabricated by wire and arc additive manufacturing
摘要
Abstract
In order to study the mechanical properties of wire and arc additive manufacturing(WAAM)stainless steel components,a group of tubular stub columns with different diameters,heights and wall thicknesses were fabricated by WAAM technology,and the basic mechanical properties of 316L stainless steel were obtained by tensile tests of standard specimens.Geometric measurements were carried out with 3D laser scanning to determine their geometric parameters and local imperfections.Through the compression test of stub columns,the failure mode was obtained and compared with the local geometric imperfection shapes.The load-end axial displacement curves were then obtained,and the axial compression capacity and the related influencing factors were analyzed.The test results of axial compression capacity were compared with the predictions from various steel structure design codes.The results show that compared with the conventional steel tubes,the tubular stub columns by WAAM have more dimension variations in the cross-section and larger local geometrical imperfections,and the average and maximum of the maximum imperfection deviations are 0.27-0.75 mm and 0.33-0.95 mm.Local buckling occurs in all tubular stub columns in the compression capacity tests,and the buckling region is close to the region with large local geometrical imperfections.The normalized axial compressive loading of tubular stub columns by WAAM ranges from 0.88 to 1.06.Generally speaking,the corresponding axial compression capacity decreases with the increase of the slenderness ratio,and the local geometric imperfections have a certain influence on the ultimate capacity.The tubular stub columns by WAAM can satisfy the ultimate capacity requirements of European code EN-1993-1-4 and American code AISC 370,while most specimens fail to meet the design axial compression capacity requirements of the Chinese Code DL/T 5154-2002.关键词
圆管短柱/不锈钢/电弧增材制造/几何测量/轴压性能Key words
tubular stub column/stainless steel/wire and arc additive manufacturing/geometrical measurement/compression performance分类
建筑与水利引用本文复制引用
赵阳,陈寅,王震,叶俊..电弧增材制造不锈钢圆管短柱的几何特性和轴压性能[J].建筑结构学报,2024,45(4):120-130,11.基金项目
国家自然科学基金项目(52078452,52208215),浙江省基础公益研究计划项目(LGG22E080005,LQ22E080008). （52078452,52208215）
