通过大量的数值分析,研究了求解轴力或轴力与弯矩共同作用下,约束钢柱屈曲温度和破坏温度的实用设计方法。设计中,考虑附加轴向压力并限制热伸长,采用火灾中自由柱的设计方程计算约束柱的屈曲温度。计算约束柱的破坏温度时,引入了轴向屈服力与塑性弯矩的相关曲线。将不同情况下该方法的分析结果与ABAQUS软件的模拟结果进行对比,可知二者吻合较好。 Through a great deal of numerical analysis, the practical design method of restraining the buckling temperature and failure temperature of the steel column under axial force or axial force is studied. In the design, considering the additional axial pressure and limiting the thermal elongation, the buckling temperature of the restraining column is calculated using the design equation of free column in fire. When calculating the failure temperature of the restraint column, the correlation curve of axial yield strength and plastic bending moment is introduced. Comparing the analysis results of this method with the simulation results of ABAQUS software in different situations, we can see that the two agree well with each other.