钢管混凝土T形短柱轴压力学性能试验研究

Test Study on Behavior of T-shaped Concrete Filled Steel Tubular Short Columns under Axial Compression

异形钢管混凝土柱应用于实际工程显示出良好的发展前景。本文在考虑肢厚、肢宽、管壁厚度和腹板宽度等参数的基础上,设计制作6个钢管混凝土T形短柱试件。通过轴心受压试验,考察试件的破坏形态,实测试件的荷载―平均纵向变形曲线和极限承载力,分析各参数对钢管混凝土T形短柱轴心受压力学性能的影响。参考国内外有关矩形钢管混凝土柱承载力的计算理论和计算方法,在分析试验数据的基础上,建立了钢管混凝土T形短柱轴心抗压极限承载力计算公式,公式可供实际工程设计参考。

The application of concrete-filled steel tubular column with special shaped section to the tall buildings shows good development in practice. Considering several factors include thickness of steel, width of steel, thickness of steel pipe, width of web and so on, 6 T-shaped concrete-filled steel tubular short colunms were designed and manufactured, axial compression tests were carded out and the load--average longitudinal deformation relationship curves as well as ultimate bearing capacity were tested ,and then, the failure modes of specimens were investigated and the effects of each influence factors on the mechanic properties of this type of short columns were analyzed. Based on the theory and method of computation at home and abroad, the formula for the axial compression bearing capacity of T-shaped concrete-filled steel tubular short columns was deduced through the analysis of experimental data, and the formula is valuable to the engineering design.