Hexagonal concrete-filled steel tubular (HCFST) columns have been used to carry large loads in tall composite buildings. Their behavior and strength are different from those of circular and square concrete-filled steel tubular (CFST) columns due to the confinement effect. This article describes a computational modeling method of nonlinear fiber analysis recognizing the concrete confinement for the response simulation of HCFST short columns subjected to axial compression. New constitutive relations of confinement for quantifying the confining stresses on the concrete confined by the hexagonal steel tube and the residual concrete strength are developed by means of analyzing existing test data. The computational modeling program written is verified by existing experimental data and then employed to ascertain the behavior of HCFST columns with important parameters. The current design standards for CFST circular columns are used to determine the strengths of HCFST columns to evaluate their applicability to the design of HCFST columns. Proposed is a new simple design equation for computing the axial capacities of HCFST columns. The computational model and the design equation proposed are shown to be accurate, and effective simulation and design tools for HCSFT stub columns that are loaded concentrically in comparisons with the current design codes.

六角钢管混凝土 (HCFST) 柱已被用于在高层复合建筑中承载大载荷。由于约束效应，它们的行为和强度不同于圆形和方形钢管混凝土 (CFST) 柱。本文介绍了一种非线性纤维分析的计算建模方法，该方法识别混凝土约束，用于承受轴压的 HCFST 短柱的响应模拟。通过对现有试验数据的分析，开发了新的约束本构关系，用于量化六边形钢管约束的混凝土上的围压和剩余混凝土强度。编写的计算建模程序通过现有实验数据进行验证，然后用于确定具有重要参数的 HCFST 柱的行为。CFST 圆柱的当前设计标准用于确定 HCFST 柱的强度，以评估其对 HCFST 柱设计的适用性。提出了一种新的简单设计方程，用于计算 HCFST 柱的轴向承载力。与当前的设计规范相比，所提出的计算模型和设计方程被证明是对同心加载的 HCSFT 短柱的准确、有效的模拟和设计工具。提出了一种新的简单设计方程，用于计算 HCFST 柱的轴向承载力。与当前的设计规范相比，所提出的计算模型和设计方程被证明是对同心加载的 HCSFT 短柱的准确、有效的模拟和设计工具。提出了一种新的简单设计方程，用于计算 HCFST 柱的轴向承载力。与当前的设计规范相比，所提出的计算模型和设计方程被证明是对同心加载的 HCSFT 短柱的准确、有效的模拟和设计工具。