高强箍筋约束高强混凝土柱轴压性能  

Axial Compression Behavior of High Strength Concrete Columns Confined by High Strength Stirrups

作　　者：王小东 张启志[2] 徐健 WANG Xiao-dong;ZHANG Qi-zhi;XU Jian(Zhumadian Construction Engineering Quality Supervision Station,Zhumadian 463000,China;Huanghuai College,Zhumadian 463000,China;Zhumadian Shunda Construction Engineering Quality Inspection Co.Ltd.,Zhumadian 463000,China)

机构地区：[1]驻马店市建设工程质量监督站,驻马店463000 [2]黄淮学院,驻马店463000 [3]驻马店市顺达建设工程质量检测有限公司,驻马店463000

出　　处：《现代应用物理》2021年第4期142-148,155,共8页Modern Applied Physics

基　　金：工程部重点基金资助项目(ZGYGC1026)。

摘　　要：针对高强箍筋约束高强混凝土柱轴压性能,共设计了11组高强箍筋约束高强混凝土短柱,对比分析了箍筋间距、箍筋强度、混凝土强度和配箍形式对高强箍筋约束高强混凝土试件破坏形态和轴压性能的影响。试验结果表明,高强箍筋约束高强混凝土试件的核心混凝土的裂缝形状主要为H型和N型,破坏形态都为柱状压坏,试验结束后核心约束混凝土较为完整,复合箍筋的约束效果较好;混凝土强度提升可增加试件的极限承载力,但素混凝土强度为C50时约束效果提升系数最大;减小箍筋间距、提升箍筋强度和采用内圆外方箍筋形式都有助于提升高强箍筋约束高强混凝土试件的极限承载力并增加延性,增强框架柱结构在地震载荷作用下的可靠性。To study the axial compression behavior of high strength concrete columns restrained by high strength stirrups,11 groups of high strength concrete short columns restrained by high strength stirrups are designed,and the influences of stirrup spacing,stirrup strength,concrete strength,and stirrup forms on the failure mode and axial compression performance of high strength concrete specimens restrained by high strength stirrups are compared and analyzed.The test results show that the crack shapes of the core concrete of the high strength concrete specimen restrained by the high strength stirrup are mainly H-type and N-type,and the failure mode is cylindrical crushing.After the test,the core restrained concrete is relatively complete,and the restraint effect of the composite stirrup is better.The increase of concrete strength can increase the ultimate bearing capacity of the specimen,but the improvement coefficient of constraint effect is the most when the strength of plain concrete is C50.Therefore,reducing the stirrup spacing,improving the stirrup strength,and adopting the forms of inner round and outer square stirrups will help to improve the ultimate bearing capacity of high strength concrete specimens restrained by high strength stirrups,increase the ductility and enhance the reliability of frame column structure under seismic load.

关 键 词：高强箍筋 高强混凝土 破坏形态 轴压性能 约束效果 

分 类 号：O342[理学—固体力学] TU311[理学—力学]