套环四肢钢管混凝土格构柱轴心受压承载力试验研究

Experiments of the Loop-four-legged Concrete Filled Steel Tubular Laced Columns on Bearing Capacity to Axial Loads

套环四肢钢管混凝土格构柱(简称套环格构柱)适用于村镇化装配式低层建筑中,其运输、安装和维护方便,为探究其受力性能,设计制作了10个套环格构柱进行了轴心受压试验,分析了套环与柱肢钢管间的间隙处理方式、缀条连接方式和长细比变化等因素对套环格构柱承载力的影响,与普通轴心受压格构柱的承载力设计计算公式比较,提出了轴心受压套环格构柱承载力计算公式,可供设计参考。

The loop-four-legged concrete filled steel tubular(CFST)laced columns are suitable for use in low-rise buildings of village.It is convenient to transport,install and maintain.In order to explore the deformation and force characteristics of the columns,10 loop-four-legged CFST laced columns were manufactured to test with axial load.The artical also analyzed the effects of factors,such as method of the gap between the loop and the steel tubular,the connection method of the bars and the variation of the slenderness ratio to the bearing capacity of the loop-four-legged CFST laced columns.Based on the comparison with the design formulas of bearing capacity of the four-legged CFST laced columns,the calculation formula of the bearing capacity of the loop-four-legged CFST laced columns to axial loads is proposed,which is available for design reference.