Compared with laminated FRP (Fiber Reinforced Plastic) tube, FRP-foam sandwich tube can improve the stability of the member and better exert the high strength of FRP. It can be used in civil engineering as compression member with lightweight, high bearing capacity and corrosion resistance. In order to study the compression characteristics of this new type of compression member, axial compression tests on the slender FRP-foam sandwich tubes were carried out compared with laminated composite tube. It was found that the main failure mode is overall buckling of this slender sandwich tube. Then the Perry-Robertson's formula based on the edge failure criterion was adopted as the basic form of the overall stability coefficient calculation formula for the sandwich tube. Afterwards the parameters of the formula were obtained based on the experimental results. As a result, the calculation equation of the overall stability coefficient for the FRP-foam sandwich tube was derived.¹

与层压FRP（纤维增强塑料）管相比，FRP泡沫夹层管可以提高构件的稳定性，并更好地发挥FRP的高强度。它可以用作土木工程中的压缩构件，重量轻，承载力高且耐腐蚀。为了研究这种新型压缩元件的压缩特性，对细长的FRP-泡沫夹芯管与层压复合管进行了轴向压缩试验。已经发现，主要的失效模式是这种细长的三明治管的整体屈曲。然后采用基于边缘破坏准则的佩里-罗伯逊公式作为三明治管整体稳定系数计算公式的基本形式。然后根据实验结果获得配方参数。结果，得出了FRP泡沫夹芯管的整体稳定性系数的计算公式。^1个