冷弯薄壁型钢构件卷边槽形截面畸变屈曲研究  

Research on Distortional Buckling for Cold-formed Thin-walled Steel Lipped Channels

作　　者：赵湘璧 刘翔 杜娟[1] 

机构地区：[1]榆林学院建筑工程系,榆林719000 [2]多维联合集团有限公司,北京102445

出　　处：《价值工程》2015年第30期149-150,共2页Value Engineering

基　　金：榆林学院高层次人才启动基金项目14GK30

摘　　要：冷弯薄壁型钢开口截面构件受力过程中除出现局部屈曲和整体屈曲外,还可能出现另外一种畸变屈曲模式,畸变屈曲以及其与局部屈曲、整体屈曲的相关作用会降低构件的极限承载力,改变构件的受力性能。所以研究畸变屈曲的发生条件有很重要的现实意义。本文采用CUFSM软件,对槽型冷弯薄壁型钢进行分析研究。依据分析结果提出畸变屈曲的发生和型钢腹板宽厚比bw/t和腹板翼缘比bf/bw的关系,以指导设计研究工作。The distortional buckling may occur for cold-formed thin-walled steel open cross-section members except local buckling and overall buckling. The distortional buckling and interaction with local and overall buckling may decrease the ultimate load＇carrying capacity of members and change mechanical properties. So it is essential to research the happen conditions of distortional buckling for high- strength cold-formed thin,walled steel lipped channels. In the paper, the CUFSM is used to analyze cold-formed thin-wall steel lipped channels. According to the analysis results, the influences of member length and section dimension on the distortional buckling are given.

关 键 词：畸变屈曲 冷弯薄壁型钢 发生条件 有限条法 

分 类 号：TU392.1[建筑科学—结构工程]