圆形和方形配筋钢管混凝土短柱受压性能比较

Comparison in compression performance of circular and square RCFT short columns

为了研究圆形和方形配筋钢管混凝土柱受压性能,对圆形和方形的中空钢管柱、素混凝土钢管柱及配筋钢管混凝土柱共30个试件进行了轴压试验,在混凝土截面积、钢管截面积和钢筋截面积稍有差别的条件下,对圆形和方形柱试件的承载力、变形性能、合成效果以及破坏模式进行了对比分析.结果表明,圆钢管混凝土柱的承载力高,变形性能好,受压性能比方钢管混凝土柱更优越;就破坏模式而言,和圆钢管混凝土柱相比,方钢管混凝土柱对于屈曲变形更为有利.

In order to study the compression performance of reinforced concrete-filled steel tube （RCFT） columns, the axial compression experiments were performed for 30 specimens including circular and square hollow steel tube columns, concrete filled steel tube （CFT） columns and RCFT columns. Under the condition that the cross section area of concrete, steel tube and reinforcement has a slight difference, the bearing capacity, deformation performance, synthetic effect and failure mode of circular and square column specimens were compared and analyzed. The results show that the circular cFr columns have higher bearing capacity, better deformation performance and more excellent compression performance than the square CFT columns. For the failure mode, the square CFT columns are superior to the circular CFlr columns in the aspect of buckling deformation.