冷弯圆钢管截面材料特性分布模型研究  

Distribution Models of Material Properties for the Cross-section of Cold-formed Steel Circular Tubes

作　　者：温东辉[1] 荀家豪 WEN Donghui;XUN Jiahao(Department of Architecture and Environmental Engineering,Taiyuan University,Taiyuan 030032,China)

机构地区：[1]太原学院建筑与环境工程系,山西太原030032

出　　处：《太原学院学报（自然科学版）》2024年第1期79-84,共6页Journal of TaiYuan University:Natural Science Edition

基　　金：山西省基础研究计划资助项目(202203021222417);太原学院校级重点科研项目(21TYKZ04);校级大学生创新创业训练计划项目(TYX2023153)。

摘　　要：对取自10种不同截面尺寸、不同直径、不同厚度的冷弯圆形钢管的120个试件进行了材料性能试验研究。结果表明:冷弯效应对材料的强度和延性影响较大;含焊缝圆弧部位的屈服强度和极限强度均比不含焊缝圆弧的部位有较大提高,而伸长率明显降低,含焊缝圆弧的断面收缩率也略有降低;不含焊缝部位和含焊缝处的强屈比也略有不同,分别为1.24和1.16。基于试验研究结果,提出了冷弯圆形钢管截面的屈服强度、极限强度、强屈比、伸长率和断面收缩率沿截面的分布模型。当相应冷弯圆钢管截面的梁、柱强度和稳定分析中需要考虑冷弯效应的影响时,可以用此分布模型进行分析。One hundred and twenty test coupons taken from ten cold-formed steel circular tubes with different values of section,diameter and thickness were tested to investigate the effects of cold-forming process on the material properties of different parts of sections.The test results indicate that the cold-forming effects have obvious influence on the strength and ductility of cold-formed tubular sections.The yield and tensile strength of weld parts are enhanced compared with specimens without welds,while the elongation decreases significantly.The section shrinkage ratio of arc with weld also decreases slightly.The strength-yield ratios of weld and non-welded parts are also slightly different,which are 1.24 and 1.16 respectively.Based on the investigation,distribution patterns of yield strength,tensile strength,tensile to yield ratio and percentage of elongation and reduction of area are proposed.This can be used for strength and stability analysis of corresponding beams and columns when the cold-forming effects are to be taken into account.

关 键 词：冷弯圆钢管 材性试验 屈服强度 冷弯效应 材料特性 

分 类 号：TU391[建筑科学—结构工程]