Effect analysis of central column on seismic dynamic response of metro station structure

Abstract

When the metro station structure has central column or no central column, the metro station structure shows different patterns of destruction. In this article, based on the nonlinear elastic-plastic finite element model for metro station, considering the structure-soil dynamic interaction, the influence laws of the central column on the dynamic response and failure mode of the metro station structure under near and far-field earthquakes are studied. We found that the horizontal displacements and dynamic amplification factors of the metro station with central columns is less than those of the metro station without central columns under near and far field earthquakes, and the existence of central column effectively inhibits the deformation and vibration of the metro station under earthquake, and improves the stability of the metro station.