建筑结构学报2026，Vol.47Issue(5)：82-93,12.DOI:10.14006/j.jzjgxb.2025.0605
激光熔融316L不锈钢方管T形相贯节点的轴压性能
Axial compression performance of square 316L stainless steel tubular T-joints fabricated by selective laser melting additive manufacturing
摘要
Abstract
To investigate the mechanical properties of the integrally formed square stainless steel tubular T-joints fabricated by selective laser melting(SLM).12 square tubular T-joints using 316L stainless steel power with varying width ratios,width-to-thickness ratios,and thickness ratios were printed.The main geometric parameters of the T-joints were obtained via three-dimensional laser scanning,and the forming accuracy and surface features were analyzed.Axial compression tests were then conducted to obtain the failure modes,load-deformation curves and key performance parameters of the T-joints.The differences between the bearing capacity test results and the bearing capacity predictions given by relevant domestic and international standards were evaluated.The results show that for specimens with the same side length of the chord tubular section,the bearing capacity significantly increased as the width ratio gone from 0.6 to 1.0,reaching nearly 10 times the original value and exhibiting various failure modes.The factors influencing the bearing capacity of the joints were,in order of importance,the width ratio,which played a controlling roll,the width-to-thickness ratio,which had a certain influence,and the thickness ratio,which had a relatively small influence.The failure modes of the T-joints included plastic failure of the chord flange,buckling failure of the chord web and combined failure modes,with local buckling of the brace involved in some specimens.For several T-joints,the measured bearing capacities were lower than the predictions of the Chinese standard GB 50017-2017;thus,design based on this standard may be non-conservative.The bearing capacity predictions of the international standard CIDECT and the European standard EN 1993-1-8:2020 generally provided the lower-bound values relative to the test values,indicating that design based on these standards is safe.关键词
不锈钢方管/金属增材制造/T形相贯节点/几何测量/轴压试验/轴压性能Key words
stainless steel square tubular/metal additive manufacturing/T-shaped intersection joint/geometrical measurement/axial compression test/axial compression performance分类
建筑与水利引用本文复制引用
王震,李星志,方睿,张炜炜,叶俊,赵阳..激光熔融316L不锈钢方管T形相贯节点的轴压性能[J].建筑结构学报,2026,47(5):82-93,12.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),绍兴市科技计划项目(2024B13004). （52078452,52208215）
