Nonlinear Seismic Response and Damage Analysis of a Prefabricated Subway Station Structure

In order to study the dynamic characteristics of the prefabricated subway station structure (PSSS), a finite element model was developed to simulate interaction among the soil, the envelope structure, and the underground PSSS during earthquakes. Numerical simulation and analysis of the nonlinear seismic responses of the PSSS were implemented. The dynamic relative horizontal deformation of structure and the stress responses on the components were analyzed in detail. The seismic damage characteristics of the PSSS were discovered preliminarily. The results indicated that within the seismic fortification levels, the PSSS had excellent seismic performance and met the seismic performance requirements of the current standard. The additional influence of vertical ground motion on the seismic response of PSSS could not be ignored. Due to the significant increase in damage under the giant earthquakes, the side walls, the crown arch, and the envelope structure were the weak positions for earthquake resistance, which should be given sufficient attention. The research conclusions could provide reasonable reference and guidance for the seismic design of the PSSS.