现在建筑中室内柱角凸出问题，严重影响了建筑的使用功能和审美观。由此设想，在高层钢结构建筑中，采用类似异形截面钢筋混凝土柱的异形截面钢柱，就能很好的解决以上问题。但是国内外对十字形钢柱研究很少，所以对十字形钢柱的受力性能和抗震性能的研究，具有非常重要的理论意义和工程实践价值。 本文通过轴压比、翼缘宽厚比和腹板高厚比，研究这三个因素对十字形截面钢柱受力性能和抗震性能的影响，利用ANSYS有限元软件对构件进行数值模拟计算和研究。对构件在单向加载作用下的受力性能和循环荷载作用下的破坏模态、变形模式、滞回性能、骨架曲线、延性性能、耗能能力及刚度退化等抗震性能指标进行了比较系统的研究。研究表明十字形钢柱的破坏模态都经历了三个不同的阶段：弹性阶段、弹塑性阶段和局部屈曲失稳的塑性破坏阶段；破坏以塑性变形为主，构件变形发展都比较充分，滞回曲线饱满，具有较好的延性性能和耗能能力；随着轴压比增大，构件的滞回性能、延性性能等抗震性能指标降低，在综合因素的考虑下，建议对其轴压比进行限制，取n=0.4左右为宜；随着翼缘宽厚比增大，构件的滞回性能有所降低，但降低不是很明显；随着腹板高厚比的增大，构件的滞回性能、延性性能等抗震指标降低。 结合现有的十字形钢柱的受力性能特点，作者提出了十字形钢柱的改进方案。改进方案钢柱减少连接部位应力过于集中，提高了十字形钢柱的承载能力和抗震性能。对构件在单向加载作用下的受力性能和循环荷载作用下的破坏模态、变形模式、滞回性能、骨架曲线、延性性能、耗能能力及刚度退化等抗震性能指标和传统形进行对比研究。经分析比较发现，改进形钢柱虽然钢材用量提高了4.7％-11.3％，但是相应所得到的极限荷载 比传统形极限荷载 提高了15％-25％，说明对构件截面的改进是有意义的，也是很有必要的。

In present the problem such as indoor column angle projection affect the use function and aesthetics of the building seriously. So we can imagine that if the high-rise steel structure building use special-shaped section steel column of similar steel reinforced concrete column, then the above problem will be solved very well. But at home and abroad on the figure ten steel column research rarely,so the research of the mechanical properties and seismic performance of profiled steel column has very important theoretical meaning and engineering practical value. In this paper, research axial compression ratio, flange wide thickness ratio and web high thickness ratio on the mechanical properties and seismic performance of profiled steel column. Build three groups of models, set up 7 components, and use the finite element software for numerical simulation and researching. Systematically research the mechanical properties of component under unidirectional loading and the anti-seismic performance index such as the failure mode, deformation pattern, hysteresis behavior, skeleton curve, ductility, energy dissipation capacity and the stiffness degradation performance and so on. Research shows that the destruction modal of the cross section steel special-shaped columns experienced three different stages: elastic stage, elastic-plastic stage and the plastic stage of local buckling instability;Damage is mainly plastic deformation, the development of components’ deformation are enough. The hysteretic curve is full. Modal has good ductility and energy dissipation performance; With the enlargement of the axial compression ratio, hysteretic behavior of components, such as reduced ductility seismic performance index, thecomprehen- sive factors, suggestions on the axial compression ratio is limited, take around n=0.4 appropriate; With the flange width thickness ratio, hysteretic behavior of components is reduced,but the decrease was not obvious; With the web depth thickness ratio increases, hysteretic behavior of components,such as reducing ductility seismic index. Combined with the existing ten shaped steel column stress characteristics, the author put forward the improvement scheme ten shaped steel column. Improvementof steel column redu- ce the connection part stress is too concentrated, enhances the bearing capacity and seismic behavior of steel columns in figure ten.The author proposed the improved scheme of cross section steel column aim at this situation. Comparing and researching the mechanical properties under unidirectional loading and the seismic performance indicators such as the failure mode, deformation pattern, hysteresis behavior, skeleton curve, ductility, energy dissipation capacity and the stiffness degradation performance and so on under cyclic loading of components. Through the analysis and comparison, the author found that improvement of shaped steel column can increase steel consumption by 4.7% to 11.3%, but the corresponding limit load increased by 15% to 25% than the limit load of traditional form. We can draw a conclusion that the improvement of component section is meaningful and necessary.