双相不锈钢S32001冷弯卷边角钢弯扭屈曲承载力设计方法  

Flexural-torsional Buckling Resistance of Duplex Stainless Steel S32001 Cold-formed Lipped Angle Steel

作　　者：王培军[1] 叶守杰 朱浩 刘圣臣 吕佰毅 WANG Peijun;YE Shoujie;ZHU Hao;LIU Shengchen;LYU Baiyi(School of Civil Engineering,Shandong University,Ji′nan,China,250061;Qingdao Metro Group Co.Ltd.,Qingdao,China,266000)

机构地区：[1]山东大学土建与水利学院,山东济南250061 [2]青岛地铁集团有限公司,山东青岛266000

出　　处：《沈阳建筑大学学报(自然科学版)》2025年第1期20-30,共11页Journal of Shenyang Jianzhu University:Natural Science

基　　金：国家自然科学基金项目(52078280)。

摘　　要：深入分析双相不锈钢S32001冷弯卷边角钢悬臂构件的弯扭屈曲性能,并提出可靠的设计方法,实现此类构件作为地铁疏散平台支架的大规模应用。对双相不锈钢S32001冷弯卷边角钢悬臂结构展开了试验研究与有限元分析,研究了角钢卷边宽厚比对角钢悬臂结构弯扭屈曲性能的影响,并基于弹性屈曲理论建立了冷弯卷边角钢弯扭屈曲承载力计算方法。截面肢长相同时,卷边角钢截面构件的极限承载力较普通角钢截面构件可提高70%~145%。随卷边宽厚比a/t增大,卷边角钢构件抗弯承载力比值M n/M y呈上升趋势。采用所建立的计算方法得到的预测结果与有限元分析结果吻合良好。双相不锈钢卷边角钢悬臂构件具备出色的弯扭屈曲承载能力,在工程结构中具有广阔的应用前景。To achieve the large-scale application of cold-formed lipped angle steel cantilever beams made of duplex stainless steel S32001 as the supports for subway evacuation platforms,this paper conducted an in-depth analysis of the flexural-torsional buckling behavior of the cantilever beams and proposed reliable design methods.Experiments and finite element analysis were conducted on the flexural-torsional buckling resistance of cold-formed lipped angle steel made of duplex stainless steel S32001,and it was investigated that the effect of the width-to-thickness ratio of the rolled edge on its behavior.Besides,design method was developed for the flexural-torsional buckling resistance of lipped angle steel made of duplex stainless steel S32001.The results indicated that the ultimate resistance of the lipped angle steel was 70%-145%higher than that of the standard angle steel with the same leg length.In addition,with the increase of the width-to-thickness ratio of the rolled edge,the ratio of bending capacity of the angle steel was enhanced.The comparison between the predicted results with the finite element results presented good consistency.Overall,the cantilever specimen made of the S32001 cold-formed lipped angle steel performed excellent flexural-torsional capacity,indicating its broad application prospect.

关 键 词：双相不锈钢S32001 冷弯卷边角钢 弯扭屈曲性能 卷边宽厚比 设计方法 

分 类 号：TU391[建筑科学—结构工程]