Abstract: In order to minimize the limitation of the conventional simplified plane analysis method used for the structural analysis of metro station structures, the three dimensional structure analysis on a typical segment of the Xiagang North metro station main structure by using ANSYS 13.0. The stress characteristics during the construction and the in the normal operation of the main structures are analyzed. The results indicate that, each floor slab has bidirectional positive bending moments and the side walls have obvious force acting on them. The three dimensional analysis has the advantages over the conventional plane analysis method by considering the effect of all structural elements. In the condition of a void in the middle of the slab, the threedimensional analysis method can consider the effect of the void, which the conventional method could not. The analysis results also indicate the most unfavorable condition is when the station is under the normal operation conditions.

Key words: Metro Stations, Three Dimensional Analysis, The finite element analysis；Internal Force of Structures