【摘要】 将2种厚度的Q345冷成型钢试件加热至不同温度,待冷却至室温后进行轴向拉伸试验。分析冷成型钢材料高温后的本构曲线,以及相关力学性能指标的变化规律。归纳不同的厚度对冷成型钢材料力学性能的影响。利用Origin对试验数据处理并拟合出相关指标的预测方程,以便准确地预估材料高温后的力学性能,可用于冷成型钢结构火灾后的性能评估。更多还原

【Abstract】 The Q345 cold-formed steel specimens of two thicknesses were heated to different temperatures and axial tension tests were performed after cooling to room temperature. Analyze the constitutive curve of cold-formed steel after elevated temperature, and the change rule of relevant mechanical properties. The effects of different thicknesses on the mechanical properties of cold-formed steels are summarized. Using experimental data to fit the predictive equations of the relevant indicators by Origin, it is possible to accurately predict the mechanical properties of the material after elevated temperature, and it can be used to evaluate the performance of cold-formed steel structures after a fire.更多还原