Abstract:The response of subway station structure under coupled ground motion is complex. This paper uses a finite element method for dynamic response research. Dynamic response of the subway station structure was analyzed under the horizontal, vertical, and bi-directional coupled ground motion. Results showed that:(1) Coupled ground motion has little effect on the relative horizontal displacement of the structure, but has a large effect on the relative vertical displacement of the structure. (2) Coupled ground motion can decrease the principal stress of the middle column, but cannot change the distribution of principal stress of the middle column to a large extent. (3) The bottom of the middle columns and joints of the station are weak positions under unidirectional and coupled ground motion, which require more attention in seismic design.