In recent years considerable attention has been given to estimating the strength of box concrete-filled steel tube (CFST) stub columns. The effect of confining pressures is one of the complexities in determining the ultimate strength of the CFST columns. An experimental database of 188 tested columns has been used to produce two types of formulae: modified and simplified, that can help to predict the ultimate strength of box CFST columns with a wide range of geometrical and material properties. Different code procedures and previous formulae given by other authors were used for verification purposes and to show reliability. The axial load-shortening behaviors of composite columns were plotted using a proposed model of confined concrete adopted in a finite element analysis and compared with the experimental results. It has been found that the present formulae and concrete model have given results that agree quite well with the results of the experimental tests.

近年来，人们对估计箱形混凝土钢管（CFST）短柱的强度给予了极大的关注。限制压力的影响是确定CFST柱极限强度的复杂因素之一。一个由188个经过测试的色谱柱组成的实验数据库已用于生成两种类型的公式：修改后的公式和简化的公式，这些公式可以帮助预测具有广泛几何和材料特性的箱式CFST色谱柱的极限强度。其他作者提供的不同代码程序和先前公式用于验证目的并显示可靠性。利用有限元分析中提出的密闭混凝土模型，绘制了复合材料柱的轴向缩短性能，并与试验结果进行了比较。