摘要
进行了钢管混凝土格构柱偏心受压试验,试验参数为长细比。介绍了试验的情况和过程,对柱肢钢管纵向应变、环向应变、缀管的纵向应变等进行了分析。研究结果表明,随长细比的增加,钢管混凝土格构柱的极限承载力逐渐降低。柱肢以受轴压为主,属于小偏压构件。近载侧的柱肢在试件进入非线性后紧箍效应开始发生作用。缀管的受力较小且都处在弹性阶段。受缀管的影响,节点处柱肢钢管环向应变很大,它是引起柱肢钢管撕裂从而导致试件破坏的主要原因。
Eccentrically loaded concrete filled steel tubular （CFST） laced columns were tested with slenderness ratio as main experimental parameter. Detailed strain measurement and analysis were conducted for the longitudinal elements and the lacing tubes. Test results indicate that the ultimate load carrying capability of the CFST laced columns compressed eccentrically reduces with the increase of slenderness ratio. The compression force dominates the loading condition in the longitudinal elements and thus they can be considered as eccentrically loaded column with small eccentricity. The circumferential straining takes effect in longitudinal elements on the loading side after the specimen enters nonlinear phase. During the loading, the lacing tubes remained in elastic stage. It was observed that complicated and excessively large strains existed near the nodes of the longitudinal elements and the lacing tubes, which initiated the tearing of the tube walls and eventually resulted the total failure of the member.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2006年第4期73-79,共7页
Journal of Building Structures
基金
国家自然科学基金资助项目(50578042)
福建省重大科技项目(2003F007)
关键词
受力性能
钢管混凝土
格构柱
偏心受压
structure behavior
concrete-filled steel tube（CFST）
laced columns
compress eccentrically
作者简介
陈宝春（1958-），男，福建罗源人，工学博士，教授。
