According to the extensive application of the dendriform-column structure, the paper selects some typical dendriform-column forms at railway stations, adopts ANSYS, the finite element software, to undertakes the analysis and research on the first and second elasto-plastic limit bearing capacity, and provides some direction for the engineering design by the finite element validation and analysis of the ultimate bearing capacity changes of the dendriform structure.%针对钢管树状结构在公共交通建筑中的广泛使用，选取几个典型的火车站树状柱结构形式，采用有限元软件ANSYS进行一、二阶弹塑性极限承载力的分析研究。通过有限元验证，分析树状结构极限承载力的变化，为工程设计提供指导。
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