随着钢管混凝土结构在工程中的广泛应用，国内外许多学者对其力学性能和设计方法进行了较为深入的研究，与应用相比，钢管混凝土结构的研究开展得还并不多。本文采用非线性有限元方法对钢管混凝土格构式柱在单向水平荷载和循环荷载作用下的受力性能进行深入研究，以更好地协调结构的承载力、刚度和延性这三者的关系，对于指导实际工程具有十分重要的现实意义。 本文考虑材料非线性、几何非线性和状态非线性，利用有限元软件ANSYS对钢管混凝土格构式柱的受力性能进行了模拟，分析了含钢率、轴压比、柱肢高度以及混凝土强度和钢材强度等因素，对钢管混凝土格构式柱的承载力、刚度、强度退化、耗能性能等进行了系统研究。通过分析研究，得出以下结论：从经济适用的角度来看，含钢率可提高，但是提高的幅度不宜太大，含钢率过大柱肢钢管底部应力集中现象严重，试件的承载力和刚度提高的幅度降低。柱肢高度要严格控制，柱肢高度越高，柱肢承载力和刚度越低，柱肢高度太高柱将失稳而提前破坏，材料的性能不能充分发挥。轴压比对柱受力性能的影响很小，故在实际工程中仅需满足相关规范即可。混凝土强度不需要提高太高，它对柱承载力影响很小。因此，工程中建议使用强度等级为C50、C60混凝土。钢材强度也不需要提高太高，尽管提高钢材强度对柱的承载力和刚度提高幅度较大，但是钢材强度过高钢材的应力集中现象严重。因此，工程中建议使用Q345、Q390钢材。综上所述，工程中要采用合适的含钢率、合理的柱肢高度、合适的钢材强度和混凝土强度、控制合理的轴压比，以满足实际工程中结构可靠性和适用性的需要。 本文深入地分析了钢管混凝土格构式柱在单向水平荷载和循环荷载作用下的受力性能，研究工作和得出的结论为钢管混凝土格构式柱理论和设计方法的研究应用、以及探索新型的结构形式提供了有价值的数据和参考依据，为进一步研究钢管混凝土格构式柱的受力性能打下了良好的基础。

Concrete filled steel-tubular structure's mechanical properties and design methods were studied by many scholars with its widely used in engineering. Compared with the large number of applications, CFST is not much research. In order to realistically simulate the concrete filled steel-tubular lattice column's mechanical behavior in the earthquake, the CFST column's mechanical properties under cyclic loading were deeply studied in this paper. The result of study can coordinate the relationship of the bearing capacity, stiffness and ductility, and can have great practical significance for engineering design. Basing on considering material nonlinearity, geometric nonlinearity and status-changing nonlinearity of the structure, numerically simulate mechanical behavior of concrete filled steel built-up stud by ANSYS. Then analyze the influences of concrete filled steel built-up stud caused by variation of steel ratio, axial load ratio, height of column limbs, strength of concrete and strength of steel. Finally, overall study bearing capacity, stiffness degradation, strength degradation, dissipation characteristics of concrete filled steel built-up stud and stress distribution of column limbs steel pipe, concrete, lacing members. Above all, the concrete research achievements are as follows: The main influencing factors of mechanical behavior of column are steel ratio and the height of column limbs. The steel ratio can be properly increased, but increased range should not be too wide. The reason is if steel ratio is too high, stress concentration of the bottom of column limbs steel pipe will be pricked and increased ranges of bearing capacity and stiffness of components will be decreased. The height of column limbs should be controlled strictly, because if the height of column limbs is higher, the bearing capacity and stiffness of column limbs will be lower. If the column limbs are too high, the components will be unstable and destroyed early, or even capacity of stuff can not be fully played. The influence of mechanical behavior of column caused by axial load ratio is little, so it only needs to satisfy the requirements of related specifications. The strength of concrete should not be too high, because it has little effect to the bearing capacity of column, and increasing the strength of concrete will cause economic performance decreasing and inconvenience of construction. So, suggest to use concrete which grade is C50 and C60 in the real construction. The strength of steel should not be too high, because although increasing the strength of steel can have wide increasing range of bearing capacity and stiffness, stress concentration of steel will be pricked. So, controlling the strength of steel reasonably are very important to the safety of structure and project cost. Therefore, suggest to use steel which grade is Q345 and Q390 in the real construction. Therefore, the actual project auto use a appropriate thickness, a reasonable slenderness ratio, a appropriate strength of steel and concrete, and a reasonable axial compression ratio in order to meet project needs. The mechanical properties of CFST lattice column under cyclic loading is deeply analysed. The results should provide the valuable data and reference for theory and design methods of CFST lattice column, and also explore of the new structure. This paper lays a good foundation for the further study of the CFST lattice column's mechanical properties.