Concrete-filled double skin steel tubular (CFDST) columns with galvanized corrugated steel tubes are a novel type of composite members. Such column consists of a layer of concrete sandwiched between an outer corrugated steel tube and an inner flat or a corrugated steel tube. It is expected to combine the advantages of each component, and have additional advantages in corrosion resistance, local stability, and ductility. In this study, a total of 21 large-scale stub specimens were fabricated to investigate the axial behaviour of the proposed columns. The test results indicated that such columns are feasible and competitive in local stability and ductility. Generally, a larger axial bearing capacity can be obtained by retaining the inner flat steel tube in the proposed CFDST members while better ductility is gained if corrugated steel tubes are used as both inner and outer skins. Strain/stress analysis of the column surfaces indicated that the confinement provided by the thin-walled corrugated steel tubes on the sandwiched concrete was sufficient. The axial bearing capacity resisted by the corrugated steel tubes was negligible due to its unique configuration together with the accompanied local bending effect. Based on the test results, four available design models for predicting the axial bearing capacities of traditional CFDSTs were adopted to assess their applicability for the newly proposed columns with galvanized corrugated steel tubes, with specific design suggestions proposed eventually.

带镀锌波纹钢管的混凝土双壁钢管（CFDST）柱是一种新型的复合构件。这种柱子由夹在外波纹钢管和内扁平或波纹钢管之间的混凝土层组成。期望结合每种组分的优点，并且在耐腐蚀性，局部稳定性和延展性方面具有其他优点。在这项研究中，总共制作了21个大型短管样品，以研究所提出的圆柱的轴向性能。测试结果表明，这种色谱柱在局部稳定性和延展性方面是可行的并且具有竞争力。通常，通过将内部扁平钢管保留在建议的CFDST构件中，可以获得更大的轴向承载能力，而如果将波纹钢管同时用作内外蒙皮，则可以获得更好的延展性。柱表面的应变/应力分析表明，薄壁波纹钢管对夹层混凝土的限制是足够的。由于其独特的构造以及伴随的局部弯曲作用，波纹钢管抵抗的轴向承载力可以忽略不计。根据测试结果，采用四种可用的设计模型来预测传统CFDST的轴向承载力，以评估其在新提议的镀锌波纹钢管柱中的适用性，并最终提出具体的设计建议。