Establishment of an analysis model for the influence of seismic liquefaction site position change on seismic performance of metro stations

Abstract

In recent years, the construction of subway projects has flourished, and the flow of personnel in underground structures such as subway stations has also increased. Once earthquakes occur, they will bring a series of unpredictable and malignant effects to the country. Therefore, it is necessary to strengthen the subway stations, etc. Research on earthquake resistance of underground structures. According to the research on the earthquake damage that has occurred, it is found that the underground structure damage such as the subway station is caused by the liquefaction caused by the earthquake. Based on the powerful functions of ABAQUS in solving nonlinear problems, this project establishes a two-dimensional liquefiable field-metro station finite element analysis model. The subway station form mainly adopts the commonly used two-story double-span island metro station structure. Based on the open secondary development port of ABAQUS embeds a sand constitutive subroutine that can describe the nonlinear characteristics of sand liquefaction dynamics, which provides a reference for a certain degree of reference for the difference of seismic response of metro stations in the future.