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对恒定轴力和绕弱轴循环弯矩共同作用下的9根高厚比较大的H型钢梁-柱进行了试验研究。考虑横截面的不同类别,翼缘和腹板选择不同的宽厚比,并提出一套可靠的试验方案。试验结果表明,局部屈曲在所有未发生整体屈曲的试件的破坏中占主导地位。对于绕弱轴的弯曲,H型钢件表现出良好的塑性变形能力,由此可判定现行规范中H型钢的分类方法不适用于绕弱轴弯曲的情况。此外,研究发现,翼缘或腹板的宽厚比以及轴向力的比例对滞回特性的影响互相依赖,因此应视为交互作用。
Nine H-beam beams with large thickness and high thickness were studied under the action of constant axial force and bending moment around the weak axis. Considering the different types of cross sections, the flanges and webs are chosen for different aspect ratios and a set of reliable test protocols are proposed. The experimental results show that local buckling is dominant in the destruction of all specimens without global buckling. For the bending around the weak axis, H-section steel shows good plastic deformation capacity, which can determine the current specification H-beam classification method is not suitable for bending around the weak axis. In addition, the study found that the effect of the ratio of aspect ratio and axial force of flange or web to hysteretic characteristics is dependent on each other and should therefore be considered as an interaction.