东南大学学报（自然科学版）2016，Vol.18Issue(3)：523-531,9.DOI:10.3969/j.issn.1001-0505.2016.03.012
焊接 H 形截面钢柱板组弹塑性相关屈曲和容许宽厚比
Elasto-plastic interactive buckling and allowable width-thickness ratios of plate assembly in welded H-section steel columns
摘要
Abstract
The finite element analysis model was built for the elasto-plastic interactive buckling of plate assembly in a welded H-section cantilevered steel column subjected to the vertical axial com-pressive force and the horizontal monotonic shear force.A series of geometrical and material nonlin-ear finite element analyses for steel columns with non-plastic sections were carried out by varying the axial compression ratio,the flange width-thickness ratio,the web height-thickness ratio,and the flange-web thickness ratio.Then,the practical formula of the ultimate moment ratio was obtained by the minimum relative error fitting algorithm based on the analysis results.Finally,the equation for the allowable width-thickness ratio correlation curves of plate assembly was derived on the basis of the principle of simultaneous overall and local interactive buckling.And the allowable width-thick-ness ratio correlation curves were compared with the flange and web width-thickness ratio limitation curves according to Code for Design of Steel Structures.The results show that the width-thickness ratio limitations of the flange and the web according to the code may exceed the regions enclosed by the allowable width-thickness ratio correlation curves when the slenderness ratio is small.The flange width-thickness ratio is relative to the web height-thickness ratio limitations,and both of them vary with the changes of the axial compression ratio,the flange-web thickness ratio,the member slender-ness ratio,and the plasticity development coefficient.关键词
焊接 H 形截面/局部相关屈曲/弹塑性/极限弯矩比/宽厚比限值Key words
welded H-section/local interactive buckling/elasto-plasticity/ultimate moment ratio/width-thickness ratio limitation分类
建筑与水利引用本文复制引用
邓长根,张晨辉,周江..焊接 H 形截面钢柱板组弹塑性相关屈曲和容许宽厚比[J].东南大学学报（自然科学版）,2016,18(3):523-531,9.基金项目
国家社科基金重点项目“网络型差序格局的‘关系人’经济行为一般均衡研究”（15AJL004）；国家社科基金青年项目“体验经济环境下商业生态系统和企业平台战略研究”（14CGL012）；江苏哲学社会科学研究重大项目“互联网金融产业的产业组织与政府管制研究”（2015ZDAXM005）成果之一。 （）
