摘要
通过ABAQUS有限元软件对冷弯薄壁型钢加劲腹板错列开孔柱的轴压性能进行了研究.通过比较试验和有限元分析获得的破坏模式、荷载-位移曲线以及极限承载力,发现二者具有良好的一致性,从而验证了有限元模型的准确性.基于验证的有限元模型,分析了开孔间距、孔型、长细比、腹板加劲肋板件高度以及翼缘宽厚比等对冷弯薄壁型钢加劲腹板错列开孔柱的受力性能的影响.结果表明:所有构件的破坏模式均以畸变屈曲失效破坏为主.增加错列开孔之间的间距可提升构件的极限承载力,且错列开孔构件的承载力相较并排开孔的构件可提升10%以上.孔型对构件的极限承载力影响较小.随着腹板加劲肋板件高度的增加,构件的极限承载力总体呈上升趋势.相较V形加劲截面构件,Σ形加劲截面构件的极限承载力提升约6.5%.随着构件长细比的增大和翼缘宽厚比的增加,构件的极限承载力均会有所下降.
Through the finite element software of ABAQUS,the axial compression capacity of cold-formed thinwalled steel columns with web stiffeners and staggered holes was investigated.It was found that the results of the fail⁃ure modes,load-displacement curves,and ultimate bearing capacities obtained from the experiments and the finite element analysis agree well with each other,validating the accuracy of the finite element model.Based on the vali⁃dated finite element model,the effects of five parameters,including hole spacing,hole shape,slenderness ratio of the column,the height of web-stiffener,and flange width-thickness ratio,on the mechanical behavior of coldformed thin-walled steel columns with web-stiffeners and staggered holes were analyzed.The results indicate that distortional buckling is the principal failure mode for all columns.The ultimate bearing capacity of the proposed col⁃umns with staggered holes increase with the increase in hole spacing,and the increment can reach more than 10%compared to the columns with side-by-side holes.Besides,the ultimate bearing capacity of the columns tends to as⁃cend with the increase in the height of the web stiffeners,while it is barely affected by the hole shape.Compared with the V-shaped stiffened sections,the ultimate bearing capacity of theΣ-shaped stiffened section is increased by approximately 6.5%.In addition,the ultimate bearing capacity of the columns decreases with the increase of the col⁃umn slenderness ratio and the flange width-thickness ratio.
作者
邓露
蔡宇琪
刘文豪
刘欢
DENG Lu;CAI Yuqi;LIU Wenhao;LIU Huan(College of Civil Engineering,Hunan University,Changsha 410082,China;Key Laboratory of Damage Diagnosis for Engineering Structures of Hunan Provincie(Hunan University),Changsha 410082,China;School of Civil Engineering,Southeast University,Nanjing 210096,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2023年第5期1-10,共10页
Journal of Hunan University:Natural Sciences
基金
湖南省重点研发计划项目(2018NK2053)
长沙市杰出青年培养计划项目(kq1802001)。
关键词
冷弯薄壁型钢
错列开孔
轴压
屈曲
承载力
cold-formed thin-walled steel
staggered holes
axially compression
buckling
bearing capacity
