冷弯薄壁拼合Ⅰ形截面构件腹板压屈性能研究  

ANALYSIS OF WEB BUCKLING BEHAVIOR OF COLD-FORMED THIN-WALLED Ⅰ-SECTION MEMBERS

作　　者：郭建勋 邓芃[1,2] 高兵 张显 代其磊 GUO Jianxun;DENG Peng;GAO Bing;ZHANG Xian;DAI Qilei(Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Shandong University of Science and Technology,Qingdao 266590,China;College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学,山东省土木工程防灾减灾重点实验室,山东青岛266590 [2]山东科技大学土木工程与建筑学院,山东青岛266590

出　　处：《工业建筑》2019年第10期156-162,共7页Industrial Construction

基　　金：山东省高等学校科技计划项目(J13LG05)

摘　　要：腹板无加劲肋的冷弯薄壁型钢构件在横向集中荷载或反力作用时极易发生压屈失效。对24个由自攻自钻螺钉连接的冷弯薄壁型钢双肢拼合Ⅰ形截面构件在跨中双翼缘(ITF)荷载条件下的腹板压屈性能进行试验研究。结果表明:C形槽钢拼合试件比Ⅰ形槽钢拼合试件的承载力更高、延性更好;腹板中线上布置的自攻螺钉是引起试件整体性能削弱的主导因素。Cold-formed thin-walled steel members with no stiffeners on the web are prone to buckling when subjected to lateral concentrated loads or reaction forces. The web buckling behavior of 24 cold-formed thin-walled steel doublelimb Ⅰ-section members connected by self-tapping screws was studied under the interior two flange (ITF) loading condition. The test results showed that the C-shaped channel steel built-up specimens had higher bearing capacity and better ductility than that of the Ⅰ-shaped specimens. The self-tapping screws arranged on the center line of the web played a crucial role in the overall weakening of the specimens.

关 键 词：冷弯薄壁型钢 双肢拼合Ⅰ形构件 腹板压屈性能 

分 类 号：TU3[建筑科学—结构工程]