摘要
对共计18个简支试件进行偏心受压试验,分析并研究了未加劲、腹板中央帽形加劲、腹板和翼缘中央帽形加劲3种截面复杂卷边槽钢的极限承载力、失稳模式及变形特征等特性.结果表明:有效形心移动对偏心承压构件的承载能力有很大影响.在板件中央设置帽形加劲可以适当减小板件的宽厚比,显著提升受压构件的极限承载力及钢材利用率,但畸变屈曲在构件失稳模式中起控制作用.在同等条件下,板件中央帽形加劲偏压构件的承载效率提升了15%~70%.
Eighteen simply supported eccentric compression specimens were tested to investigate the ultimate bearing capacity,instability mode,and deformation of three types of complex edge stiffened channels,including no stiffeners,intermediate cap shaped stiffeners in the web,intermediate cap shaped stiffeners in the web and the flanges. Results show that offset of the effective centroid has a significant effect on the bearing capacity of eccentric compressed members. Cap shaped stiffeners can effectively reduce the width-to-thickness ratio of the element and obviously increase the ultimate load bearing capacity as well as the steel utilization ratio of elements,but distortional buckling can become the dominate failure mode. Under the same conditions,the load bearing efficiency of plate with intermediate cap shaped stiffeners is improved by 15% ~ 70%.
作者
宋波
王连广
王春刚
SONG Bo;WANG Lian-guang;WANG Chun-gang(School of Resources ＆ Civil Engineering, Northeastern University, Shenyang 110819, China;Civil Engineering College,Shenyang Jianzhu University,Shenyang 110168,China.)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第2期272-277,共6页
Journal of Northeastern University(Natural Science)
基金
辽宁省自然科学基金资助项目(2015020575)
关键词
复杂卷边槽钢
帽形加劲
极限承载力
失稳模式
有效形心移动
channel with complex edge stiffener
cap shaped stiffener
ultimate bearing capacity
instability mode
shift of effective centroid
