The paper presents a new mathematical model and its exact solution for the buckling analysis of circular CFDST slender columns with compliant interfaces between the steel tubes and sandwiched concrete. The exact critical buckling loads are calculated for the first time. The results are compared to the experimental results and good agreement is obtained. A parametric study is also performed to investigate the effects of different parameters on buckling loads. It is shown that buckling loads can be significantly affected by the finite interface compliance.

中文翻译：

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具有兼容接口的圆形CFDST细长柱的屈曲：精确的解决方案

本文提出了一种新的数学模型及其精确的解决方案，用于分析钢管与夹层混凝土之间具有柔顺界面的圆形CFDST细长柱的屈曲。首次精确计算了临界屈曲载荷。将结果与实验结果进行比较，并获得良好的一致性。还进行了参数研究，以研究不同参数对屈曲载荷的影响。结果表明，屈曲载荷会受到有限接口柔量的显着影响。