建筑结构学报2026，Vol.47Issue(2)：57-70,14.DOI:10.14006/j.jzjgxb.2025.0089
准静态斜向荷载作用下层级薄壁方管吸能特性研究
Energy absorption characteristics of hierarchical thin-walled square tubes under quasi-static oblique loading
摘要
Abstract
In order to improve the energy absorption performance of thin-walled structures under inclined loading conditions,a gradient-thickness multi-cell hierarchical square tube(GHST)design was proposed.Single-cell and multi-cell hierarchical square tubes(HSTs)were fabricated using 3D printing technology,and quasi-static compression tests were conducted to assess their energy absorption performance.Numerical simulations were carried out using ABAQUS/Explicit to validate the feasibility of the proposed models.Based on the principle of equal mass,the effects of loading angle,foam aluminum filling density,and wall thickness on the collapse modes and energy absorption characteristics of the hierarchical thin-walled square tubes were systematically investigated.The results indicate that the HST exhibits progressive stable folding deformation under 0°and 10°inclined loads.But under 20° to 40° inclined loads,the structure experiences Euler buckling failure and collapse,leading to a substantial decrease in performance.The GHST effectively suppresses flexural failure,at loading angles of 0°,10°,20°,30°and 40°,its energy absorption performance exhibits relative variation rates of-5.35％,-3.36％,37.39％,26.20％and 23.34％in sequence compared with the HST.Under different foam aluminum density conditions,the total energy absorption and collapse force efficiency of the GHST are maximized,showing increases of 25.02％and 16.68％,respectively.When varying wall thicknesses are considered,the total energy absorption and collapse force efficiency exhibit the largest improvements of 37.39％and 57.76％,respectively.Overall,the gradient-thickness hierarchical square tube demonstrates a remarkable enhancement in both energy absorption performance and load-bearing capacity when subjected to inclined loading,compared to the uniformly thick hierarchical square tube.关键词
层级薄壁方管/梯度厚度/多角度荷载/数值模拟/吸能性能Key words
hierarchical thin-walled square tube/graded thickness/multi-angle load/numerical simulation/energy absorption分类
通用工业技术引用本文复制引用
方耀楚,刘乐乐,陈卓,郭新勋,陈杰,黄建军,王腾飞..准静态斜向荷载作用下层级薄壁方管吸能特性研究[J].建筑结构学报,2026,47(2):57-70,14.基金项目
湖南省自然科学基金项目(2025JJ90163),湖南省教育厅优秀青年基金项目(23B0430),湖南省大学生创新训练项目(S202310555093). （2025JJ90163）
