多腔异形钢管混凝土短柱轴压性能试验研究  

Experimental study on axial compression behavior of multi-cavity special-shaped concrete-filled steel tubular (CFST) short columns

作　　者：程卫红 姜宇鑫 申朝旭 陈家丰 储德文 Cheng Weihong;Jiang Yuxin;Shen Zhaoxu;Chen Jiafeng;Chu Dewen(China Academy of Building Research Co.Ltd,Bejing 100013,China;National Engineering Research Center of Building Technology,Beijing 100013,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013 [2]国家建筑工程技术研究中心,北京100013

出　　处：《建筑科学》2022年第9期89-96,共8页Building Science

基　　金：兵团科技攻关项目:BXSS建筑关键技术研发与示范应用(项目编号2018AB03)。

摘　　要：钢管混凝土柱的研究主要集中在圆形截面和矩形截面等标准截面,多腔异形钢管混凝土柱的轴压力学性能还缺乏系统的研究。进行了10个多腔异形钢管混凝土短柱的轴心受压试验,柱截面形式包括方形、矩形、L形、T形和十字形五种截面。研究多腔异形钢管混凝土短柱在轴心受压时的破坏模式、荷载-位移曲线、应变发展、变形能力和极限承载力等试验结果。试验结果表明,多腔异形钢管混凝土短柱的轴压破坏模式表现均为局部鼓曲破坏,轴心受压时具有良好的承载能力和变形能力,工程应用时轴压承载力计算可采用矩形钢管混凝土柱的轴压承载力计算公式。The research of concrete-filled steel tube columns is mainly focused on standard cross-section columns such as circular and rectangular column. The research on the axial compression performance of multi-cavity special-shaped concrete-filled steel tubular(CFST) columns is not enough. Axial compression tests of 10 multi-cavity CFST short columns are carried out. The cross-sections of the columns include square, rectangular, L-shaped, T-shaped and cross-shaped sections. The failure mode, load-displacement curve, strain development curve, deformation capacity and ultimate bearing capacity of multi-cavity CFST short columns under axial compression are studied. The test results show that: the axial compression failure modes of the multi-cavity CFST short columns are local buckling failure, and multi-cavity CFST short columns have good bearing capacity and deformation capacity under axial compression. In engineering applications, the axial compressive bearing capacity formula of rectangular concrete-filled steel tubular columns can be applied to calculate the axial compressive bearing capacity of multi-cavity CFST short columns.

关 键 词：多腔 异形截面 钢管混凝土 短柱 轴心受压 变形能力 承载力 

分 类 号：TU528.59[建筑科学—建筑技术科学]