钢管混凝土短柱轴压承载力试验与规范计算方法对比研究  

Comparative Study of Axial Compression Bearing Capacity Test and Normative Calculation Method for Concrete-filled Steel Tubular Short Columns

作　　者：孙明贺 SUN Ming-he(China Municipal Engineering Northwest Design and Research Institute Co.,Ltd.)

机构地区：[1]中国市政工程西北设计研究院有限公司

出　　处：《中国标准化》2024年第12期183-188,共6页China Standardization

摘　　要：为研究钢管混凝土构件尺寸效应对其承载力与规范计算方法的异同,对含钢率和套箍系数相同,截面形式不同的三种钢管混凝土短柱构件进行轴压试验,分别获取了构件在轴心压力作用下的荷载-应变关系曲线和荷载-轴向位移全过程曲线。运用叠加原理理论分析了当套箍系数相等时,不同规格钢管混凝土构件的受力性能和极限承载力提高效果。将试验值与现行规范计算值对比,研究结果表明,现有规范CECS 28:2012和DBJ 13-51—2010对钢管混凝土短柱的承载力计算值与试验值最接近;当套箍系数相等,材料性能相同、构件几何尺寸近似的圆钢管混凝土短柱具有一定的尺寸效应。Based on axial compression experiments of three kinds of concrete-filled steel tubular short columns with the same steel ratio and confining coefficient but different cross sections,in order to study the size effect of concretefilled steel tubular components on its bearing capacity and normative calculation method.The load-strain relationship curves and the load-axial displacement curves of the components under the axial compression are obtained by experiments.The superposition principle is used to analyze the effect of different specifications on the mechanical properties and ultimate bearing capacity of concrete-filled steel tubular component with equal confining coefficient.The results show that the bearing capacity of concrete-filled steel tubular short column is close to the experimental value of the existing standards including CECS 28:2012 and DBJ 13-51-2010.When the confining coefficient is equal,the concrete-filled steel tubular short columns with the same material properties and similar geometric components have a certain size effect.

关 键 词：钢管混凝土短柱 承载力 尺寸效应 本构关系 套箍系数 

分 类 号：TU398.9[建筑科学—结构工程]