自攻螺丝连接矩形薄壁钢管再生骨料混凝土柱轴压承载力分析  

Compression Performance Analysis of Recycled Aggregate Concrete Thin-walled CFST Columns Connected by Self-tapping Screws

作　　者：张贺[1] 伍凯[1] 陈柯呈 彭继莹 毛范燊 徐方媛[1] 

机构地区：[1]河海大学土木与交通学院,江苏南京210098

出　　处：《建筑科学》2016年第1期12-16,69,共6页Building Science

基　　金：国家自然科学基金项目(51208175):强震作用下SRCRC竖向混合结构体系抗震性能与设计计算方法研究;中国博士后基金资助项目(2012M511186):SRC-RC竖向混合结构体系基本抗震行为与设计方法研究;河海大学中央高校基本科研业务费项目(2011B07714):SRC-RC竖向混合结构转换柱基本力学行为与抗震设计方法研究;河海大学中央高校基本科研业务费项目(2015B44514):内桁架式钢筋混凝土异形柱受力性能研究;江苏省研究生培养创新工程:内桁架式钢管混凝土异形柱受力性能研究

摘　　要：对以废弃混凝土、废弃砖、普通骨料3种混凝土为填充料的6根薄壁矩形钢管混凝土柱进行轴压试验,探究构件的破坏特征以及长细比对轴压承载力的影响。研究结果表明:长细比λ=15,柱试件钢管局部鼓曲集中于柱顶部;长细比λ=8,柱试件集中于柱中部、底部。采用普通骨料及废弃混凝土骨料的柱试件轴压承载力计算适于《矩形钢管混凝土结构技术规程》(CECS159:2004),而采用废弃砖骨料的柱试件轴压承载力计算适于采用考虑钢管约束效应的设计规范、规程。The axial compression tests of 6 CFST columns with 3 different kinds of aggregates,such as waste concrete,waste brick and the ordinary aggregate,are carried out,and the failure feature of specimens and the influence of slender ratio on axial bearing capacity are explored. The research results show that： if slender ratio λ= 15,the partial buckling of steel tubes would concentrate on the top of the columns; if slender ratio λ = 8,the buckling area would concentrate on the middle and bottom of the columns. The calculation of axial bearing capacity of columns with ordinary aggregate and waste concrete as aggregates meets the need of Technical Specification for Structures with Concrete-filled Rectangular Steel Tube Members（ CECS159： 2004）,while the calculation of axial bearing capacity of columns with waste brick as aggregates meets the need of design specifications and regulations considering the steel tubes＇ confinement effect.

关 键 词：钢管混凝土 再生混凝土 轴压试验 轴压承载力 自攻螺丝 

分 类 号：TU375.4[建筑科学—结构工程]