Abstract
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 burial depth on the dynamic response and failure mode of the metro station structure under near and far-field earthquakes are studied. We found that the influence of burial depth on the deformation of the metro station may be omitted after a specific value of the burial depth. With the increasing of the burial depth, the acceleration dynamic amplification factors of the metro station structure decreses. At last, indoor shaking table test for metro station was done, through which we determined the position of initial failure and the failure mode of the metro station structure under earthquake.
Highlights
Metro stations are located on urban trunk roads or in urban residential areas, business districts or the most populous areas in general
China is relatively backward in seismic research of underground structure and still does not have a sound seismic analysis method for underground structure so further research and development is needed in the seismic design theories and methods regarding to underground structure
The dynamic characteristics of underground structure are controlled by the surrounding foundation soil
Summary
Metro stations are located on urban trunk roads or in urban residential areas, business districts or the most populous areas in general. Youssef M.A. Hashasha [7] stated that when underground structure shakes at a low level under low-intensity seismic action or is in hard rock or other media, the results calculated by quasi-static method are acceptable. The current domestic codes for seismic design only provide some principled provisions on the seismic design of metro [8][9], and lack systematic and perfect design theories and methods In this regard, this article established a nonlinear elastic-plastic finite element model for metro station structure based on soil-structure interaction, and we studied the influence laws of interlayer on seismic dynamic response of metro station under near and far-field earthquakes, and analyzed the dynamic damage and failure mode of metro station through an indoor shaking table test. We expected to provide reference and guidance value for engineering practice by obtaining some basic laws of metro station under seismic action
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