This paper aims to investigate the buckling and post-buckling analyses of composite cellular beams. For this, the numerical model is calibrated by experimental tests via post-buckling analysis. A parametric study is developed, considering six cross sections. For each section, the opening diameter and web post length are varied. Regarding the buckling analyses for the symmetrical sections, it was concluded that the end post is an important parameter in the strength of composite cellular beams that presents high web slenderness. The smaller the opening diameter, the greater the critical global shear. The variation in the height of the cellular beam had a little influence on larger diameters and web posts widths. Considering asymmetric sections, it was verified that the web post buckling did not happen for the first buckling mode. In this scenario, local web buckling of the upper tee was observed. With the height variation, there was an increase in the global shear. This is due to the fact that with the increase in height, the buckling mode was changed to the WPB, instead of local web buckling. Finally, there was a conservatism in the SCI P355 calculation recommendations, a factor that needs to be revised.

本文旨在研究复合蜂窝梁的屈曲和屈曲后分析。为此，通过屈曲后分析通过实验测试对数值模型进行校准。考虑到六个横截面，进行了参数研究。对于每个部分，开口直径和腹板立柱长度都不同。关于对称截面的屈曲分析，得出的结论是，端柱是呈现高纤度纤网的复合蜂窝梁强度的重要参数。开口直径越小，临界全局剪切力越大。蜂窝状梁高度的变化对较大直径和腹板柱宽度几乎没有影响。考虑到不对称截面，已验证在第一种屈曲模式下不会发生网站发布屈曲。在这种情况下，观察到上三通的局部腹板屈曲。随着高度的变化，整体剪切力增加。这是由于以下事实：随着高度的增加，屈曲模式已更改为WPB，而不是局部Web屈曲。最后，SCI P355计算建议中存在保守性，这一因素需要修改。