方钢管珊瑚混凝土短柱轴压试验与承载力研究

Axial Compressive Testes and Bearing Capacity Study of Coral Concrete Filled Square Steel Tube Short Columns

对9根方钢管珊瑚混凝土短柱进行了轴压试验研究,以试件高度、方钢管壁厚及截面边长为变量,探究了含钢率、长细比对极限承载力的影响。通过引入核心珊瑚混凝土强度提高系数,分析了套箍增强作用。将核心珊瑚混凝土分为有效约束区和非有效约束区,并分别进行了受力分析,提出了承载力计算公式,并比较了计算结果与试验结果,以验证其合理性。

In order to research the influence of steel ratio and slenderness ratio on the ultimate bearing capacity, axial compressive loading tests of 9 coral concrete filled square steel tube short columns were carried out. The parameters in the tests include the height of specimens, side length and wall thickness of square steel tubes. The core coral concrete is divided into effective restraint area and non effective restraint area to carry out stress analysis. Then the formula for calculating the bearing capacity is proposed. By comparing the calculation results and the experimental results, the rationality of the formula is verified.