The steel tube confined concrete (STCC) column piers of marine structures have been proposed in recent years. The main advantages of STCC piers include the convenient construction process and improved core concrete strength. This research presents an experimental investigation on stainless steel tube confined concrete (SSTCC) column piers subjected to axial loading. Thirty two specimens were prepared and tested. Test variables included section shape, steel tube thickness, and concrete strength. Failure modes, axial ultimate compressive strength, strain characteristics, rigidity, confinement effect, and ductility were comprehensively investigated. Test results demonstrated that the main failure modes for circular and square specimens were concrete shear failure and steel tube fracture caused by concrete deformation, respectively. The axial compressive ultimate strength was affected by the tube thickness and concrete strength. The ultimate strength increased with the increase in the confinement factor, and the increasing ratio of the circular specimens was five times to that of square specimens. The differences in axial ultimate compressive strength of SSTCC column piers, carbon steel tube confined concrete column piers, and concrete filled steel tube column piers were also analyzed. Increasing tube thickness could increase the ductility and rigidity of the specimens. Moreover, axial ultimate compressive strengths were calculated and discussed based on different calculation models.

近年来，已经提出了用于海洋结构的钢管承压混凝土（STCC）柱墩。STCC墩的主要优点包括方便的施工过程和提高的核心混凝土强度。这项研究提出了承受轴向载荷的不锈钢承压混凝土（SSTCC）柱墩的实验研究。制备并测试了32个样品。测试变量包括截面形状，钢管厚度和混凝土强度。全面研究了破坏模式，轴向极限抗压强度，应变特性，刚度，约束效应和延性。试验结果表明，圆形和方形试样的主要破坏模式分别是混凝土剪切破坏和混凝土变形引起的钢管断裂。轴向抗压极限强度受管厚和混凝土强度的影响。极限强度随着约束因子的增加而增加，圆形试样的增加比例是方形试样的5倍。还分析了SSTCC柱墩，碳钢管约束混凝土柱墩和钢管混凝土柱墩的轴向极限抗压强度的差异。增加管的厚度可以增加样品的延展性和刚度。此外，还基于不同的计算模型对轴向极限抗压强度进行了计算和讨论。圆形试样的增加比率是方形试样的增加比率的五倍。还分析了SSTCC柱墩，碳钢管约束混凝土柱墩和钢管混凝土柱墩的轴向极限抗压强度的差异。增加管的厚度可以增加样品的延展性和刚度。此外，还基于不同的计算模型对轴向极限抗压强度进行了计算和讨论。圆形试样的增加比率是方形试样的增加比率的五倍。还分析了SSTCC柱墩，碳钢管约束混凝土柱墩和钢管混凝土柱墩的轴向极限抗压强度的差异。增加管的厚度可以增加样品的延展性和刚度。此外，还基于不同的计算模型对轴向极限抗压强度进行了计算和讨论。