Elliptical concrete-filled stainless steel tubular (CFSST) columns are high-performance composite columns that have the enormous potentiality to be used in composite construction in the near future. However, to date, limited studies on the performance analysis of such columns under axial compression have been performed taking into account the accurate material laws of stainless steel and the confined concrete. This paper presents a mathematical model to investigate the axial performance of elliptical CFSST short columns. Accurate material laws of stainless steel and the confined concrete are incorporated in the numerical modeling to capture their true performance. Independent test results are utilized to validate the accuracy of the mathematical predictions. A parameter study is performed to study the important column parameters on their axial performance. The investigations of the accuracy of the existing design models for CFST columns in designing axially loaded elliptical CFSST columns are performed with the test and numerical predictions.

椭圆混凝土填充不锈钢管（CFSST）柱是高性能的复合柱，具有在不久的将来用于复合结构的巨大潜力。然而，迄今为止，考虑到不锈钢和承压混凝土的精确材料定律，对这种柱在轴向压缩下的性能分析进行了有限的研究。本文提出了一个数学模型来研究椭圆形CFSST短柱的轴向性能。数值模型中包含了不锈钢和承压混凝土的精确材料定律，以捕捉其真实性能。利用独立的测试结果来验证数学预测的准确性。进行参数研究以研究重要的柱参数对其轴向性能的影响。通过测试和数值预测研究了现有CFST柱设计模型在设计轴向加载椭圆CFSST柱时的准确性。