C形冷弯薄壁型钢切割短柱轴压试验-武汉理工大学学报.PDFVIP

27 7 武 汉 理 工 大 学 学 报 Vol. 27 No. 7 2005 7 JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY Jul. 2005 C 1 2 2 王小平 , 钟国辉 , 林少书 ( 1. , 430070; 2. , ) : 把辊轧成型的C 形冷弯薄壁型钢构件切割成若干短柱, 在短柱中将产生不同程度的歪曲 形, 进而引起附加 的初始几何缺陷对 10 个切割而成的C 形冷弯薄壁型钢短柱进行了轴压试验, 并根据GB500182002 计算了短柱的轴 压承载力结果表明: 切割短柱在轴压力作用下, 两翼缘为内收的歪曲破坏, 腹板为局部屈曲破坏模式, 短柱极限承载力 仅为规范计算值的83% ~ 89% : C 形截面; 冷弯薄壁型钢; 切割; 短柱; 轴压试验 : T Q 142. 14 : A : 2005) Axial Compression Test of C t Coldformed Steel St b Col mns with Csection 1 2 2 WAN G X iaop ing , CH UN G K w okf a i , LA M S iush u ( 1. S hool of Civil Engineering and Ar hite ture, Wuhan University of T e hnology, Wuhan 430070, China; 2. Department of Civil and St ru tural Engineering, The Hong Kong Polyte hni University, Hung Hum, Hong Kong , China) Abstract: Cutting rollformed steel Cse t ion to stub olumns will produ e different extent of ross se tion distortion along the lengths and ause additional initial geometri imperfe tions. T en ut stub olumns w ith tw o rolledformed steel Cse tion types were tested under the axial ompressive load. T he ultimate ompressive strength was al ulated for t he stub olumns base on steel design ode GB500 182002. For all the ut stub olumns, the failure modes of the two flanges were obvious distortional mode, w hile the webs w ere lo al bu kling failure. The testing ompressive ultimate strength was only 83% ~ 89% of ode al ulation value. Key words: Cse tion; oldformed steel; ut; stub olumns; ompressive test 2 : ( RolledFormed) ( PressBraked) ; , , , C , [ 1~ 3] C [4~ 7] , C