Abstract: To guide the seismic design of 〖ＪＰ２〗prefabricated structure of a metro station in Changchun, China, the basic principles of Pushover analysis method and ABAQUS finite element software are adopted to establish soilstructure interaction finite element analysis models of prefabricated and castinplace metro station structures. The internal forces of the two kinds of structures under different seismic intensities are compared and analyzed to study the law and reason of difference in internal force under horizontal earthquake. The results show the following: (1) The internal force distribution trend, the peak bending moment of the components, and the position of the reverse bending point of the two structures are the same; the peak bending moments of the two structures appear at the top arch shoulder, the middle of the top arch, and the junction between the sidewall and the bottom plate. (2) Compared with the castinplace structure, the peak bending moment of each component of the fabricated station structure is significantly reduced and the maximum reduction range of the peak bending moment is approximately 50%; the joint bending moment of the fabricated station structure is significantly lower than that of the corresponding part of the castinplace structure and the maximum reduction range is approximately 70%. (3) Under the action of horizontal earthquakes, the nonrigid joints of the fabricated station structure are deformed first, which releases the joint bending moment, and reduces the joint bending moment and the peak bending moment of the precast members, which is conducive to the seismic design of the structure.

Key words:

prefabricated metro station, internal force distribution, prefabricated joints, seismic response