建筑钢结构进展2026，Vol.28Issue(8)：74-85,12.DOI:10.13969/j.jzgjgjz.20250102001
相贯补强开洞冷弯矩形截面钢管短柱轴压性能研究
Research on Axial Compressive Behavior of Perforated Cold-Formed Rectangular Steel Tubular Stub Columns with Intersecting Tube Reinforcement
摘要
Abstract
Cold-formed steel columns used in structures often have openings in the column body due to construction requirements,but openings in the tube will weaken the cross-section,resulting in a decrease in the bearing capacity of the members.In order to reduce the influence of openings,a reinforcement method using inner-sleeved intersecting steel tubes is proposed for perforated cold-formed rectangular steel tubular columns with circular openings.By using the finite element software ABAQUS,finite element models of perforated cold-formed rectangular steel tubular stub columns and the corresponding reinforced perforated cold-formed rectangular steel tubular stub columns with four different cross-sections were established.The failure mode,load-displacement curve,and axial compressive bearing capacity were analyzed by taking the opening size ratio and the width-to-thickness ratio of the plate as parameters.The results show that after the reinforcement of the intersecting steel tubes,the failure mode and stress distribution of the perforated tubular stub columns are effectively improved,and the bearing capacity is obviously improved.,The increase in bearing capacity increases with the increase of the opening size ratio,and increases first and then decreases with the increase of the width-to-thickness ratio.Based on the comparison between the analysis results and the calculation results of the direct strength method in the North American Specification for the Design of Cold-Formed Steel Structural Members(AISI S100-2016),a modified direct strength method was proposed.关键词
冷弯型钢/钢管补强/矩形截面钢管短柱/轴压承载力/直接强度法/修正计算公式Key words
cold-formed steel/intersecting tube reinforcement/rectangular steel tubular stub column/axial bearing capacity/direct strength method/modified calculation formula分类
建筑与水利引用本文复制引用
李成玉,陈鼎盛,吴东平,陈焰周..相贯补强开洞冷弯矩形截面钢管短柱轴压性能研究[J].建筑钢结构进展,2026,28(8):74-85,12.基金项目
国家自然科学基金(51878522),湖北省住建厅科技计划项目([2023]1656号-004) （51878522）
