摘   要：通过对基于不同长细比的圆钢管混凝土短柱的受压力学试验，对其破坏现象及机理进行了分析；探讨了长细比对该类构件力学性能的影响规律，同时分析了该类构件中钢管对核心混凝土的约束作用。建立三维精细有限元模型，比较分析了数值模拟结果和试验结果，并确定了钢管及混凝土的破坏准则和其本构关系的合理性，从而为该类构件的设计提供了可靠的理论依据

Abstract: The compressed mechanical experimental study on the different slenderness ratio of concrete filled circle steel tube short columns is conducted, and the failure phenomenon and mechanism are analyzed. The influence rule of the slenderness ratio on mechanical properties of this kind of component is discussed, meanwhile, the restriction effect of steel tube on core concrete is analyzed. The 3D finite element model is established. The numerical simulation result and test result are compared and analyzed. The failure criterion of the steel tube and concrete and the rationality of its constitutive relation are determined, therefore, the reliable theory basis for the design of this kind of components can be provided.