摘要
为研究冷弯薄壁型钢卷边槽形截面受弯构件局部屈曲滞回性能,采用有限元软件Abaqus的塑性壳单元建立了有限元滞回分析模型,考虑了几何和材料非线性,通过与试验结果比较表明有限元模型是正确可行的。采用有限元模型对CUFSM软件所选取腹板宽厚比为210、230、250的三种冷弯薄壁型钢卷边槽形截面受弯构件在低周反复荷载作用下的滞回性能进行分析。结果表明随着腹板宽厚比的增加,构件的极限承载力逐渐减少、延性逐渐降低、刚度退化一致且较快。研究结果对冷弯薄壁型钢卷边槽形截面受弯构件的工程应用以及钢结构抗震设计规范具有一定的参考作用。
In order to study the local buckling hysteretic behavior of cold-formed thin-walled steel beveled groove section flexural members,the finite element hysteretic analysis model is established by using the plastic shell element of the finite element software Abaqus,and the geometric and material nonlinearity are taken into account.The comparison with the experimental results shows that the finite element model is correct and feasible.The finite element model is used to analyze the hysteretic behavior of three kinds of cold-formed thin-walled steel beveled groove section flexural members selected by CUFSM software under low cyclic load.The results show that with the increase of the width-thickness ratio of the web,the ultimate bearing capacity and the ductility decreases gradually,and the stiffness degrades uniformly and rapidly.The research results can be used as a reference for the engineering application of cold-formed thin-walled steel flanged groove section flexural members and the code for seismic design of steel structures.
作者
邬晓彬
郭彦利
程国威
余黎鹏
周水
姚行友
WU Xiaobin;GUO Yanli;CHEN Guowei;YU Lipeng;ZHOU Shui;YAO Xingyou(Yaohu Honor School,Nanchang Institute of Technology,Nanchang 330099,China;School of Architecture and Civil Engineering,Nanchang Institute of Technology,Nanchang 330099,China;Jiangxi Province Key Laboratory of Hydraulic and Civil Engineering Infrastructure Security,Nanchang Institute of Technology,Nanchang 330099,China)
出处
《低温建筑技术》
2021年第12期98-101,共4页
Low Temperature Architecture Technology
基金
国家自然科学基金资助项目(51868049)
江西省自然科学基金项目(20181BAB206040)
江西省教育厅科学技术研究项目(GJJ180932,GJJ170983)
瑶湖学院学生创新基金项目(YHCY-20-11)。
关键词
冷弯薄壁型钢
受弯构件
局部屈曲
滞回性能
cold-formed thin-walled steel
bending member
local buckling
hysteretic performance
