Short thin-walled CFRP columns with channel section were investigated in this study. The tested columns were subjected to compressive load, both axial and eccentric. Eccentric load was applied in two mutually perpendicular directions. The scope of the study included examining the effect of load eccentricity on the critical load of the column. The study involved both experimental tests performed on physical models of columns created by the autoclave technique and a numerical analysis by the finite element method. The numerical analysis of critical state involved solving an eigen problem by the minimum potential energy criterion in order to determine the buckling mode and a corresponding critical load. For physical models, the critical load was determined based on tensometric measurements by Koiter’s approximation method. The numerical results were compared with experimental findings. The study determined the effect of eccentric compressive load on the critical load of the tested column and that of composite lay-up on the structure’s stability.

在这项研究中，研究了带有通道截面的短壁CFRP短柱。被测柱承受轴向和偏心的压缩载荷。在两个相互垂直的方向上施加偏心载荷。研究范围包括检查载荷偏心度对圆柱体临界载荷的影响。该研究涉及对通过高压釜技术创建的色谱柱物理模型进行的实验测试，以及通过有限元方法进行的数值分析。临界状态的数值分析涉及通过最小势能准则解决本征问题，以确定屈曲模式和相应的临界载荷。对于物理模型，临界载荷是根据通过Koiter近似方法进行的张力测量确定的。数值结果与实验结果进行了比较。研究确定了偏心压缩载荷对被测柱的临界载荷的影响，以及复合叠层对结构稳定性的影响。