摘要
以箍筋间距、箍筋形式和偏心矩为变化参数,对10根高强箍筋约束高强混凝土柱进行偏心受压试验,研究这类柱的偏心受压性能。通过试验,观察高强箍筋约束高强混凝土柱分别在大小偏心受压时的破坏过程与破坏形态,并记录各个试件荷载挠度曲线;各个加载阶段的截面应变分布;对比分析各个试件的弯矩-曲率关系曲线;试验表明:箍筋间距较小的高强连续复合箍筋约束高强混凝土柱具有非常好的延性性能,且试验测得柱的受压承载能力均高于按现行规范的计算值;采用约束混凝土本构关系对试件进行截面分析,得到弯矩-曲率关系曲线,且与试验曲线吻合较好。
A total of 10 high-strength concrete columns confined by high-strength stirrups were tested under eccentric loading. The test parameters included the arrangement, spacing of confinement reinforcement and the eccentricities. Test results indicate that, columns confined by stirrups with small spacing and high strength show extremely ductile behavior. Also the experimental column capacities are well above the analytical capacities indicated by the interaction diagrams based on the code. The analytical moment-curvature curves obtained using confined concrete model are in good agreement with the experimental ones.
出处
《工业建筑》
CSCD
北大核心
2009年第10期76-80,共5页
Industrial Construction
基金
国家自然科学基金资助项目(50778149)
陕西省自然科学基础研究基金(SJ08E202)
陕西省教育厅专项科研项目资助(07JK291)
关键词
约束混凝土
高强箍筋
偏心受压
有限元分析
confined concrete
high-strength stirrups
eccentric loading
finite element analysis
