Analysis Of Dynamic Response Of Structures Of Multideck Metro Station For Exchanging

Subway is being constructed in varying degrees in major cities of our country to ease the congestion phenomenon and urban pollution problems.Subway construction involves complex underground structures,such as the subway station.But so far no independent seismic specification code for underground structures.The dynamic response of underground structures is not well considerated in the existing related standard when encountering seismic load.Metro station is a traffic hub with a long life cycle and the concentrated crowd,and the passenger's relationship is very complicated.Once the station is being damaged by the earthquake,it may result in significant casualties and the structure of the station serious damage.But the restoration work is more difficult than the general structure on the ground,and the indirect economic losses is far greater than the direct losses,as well as there will be a significant impact on the social life.Thus,it is very urgent that people must have some update understanding of the seismic problem of the underground structures. It has deep theoretical meaning and engineering application value to do more research on the seismic ability of the underground structure.Using finite element software,I established the plane strain finite element model applicable to the earthquake response analysis of the multideck metro station structurein this paper. I did some researeh on the dynamic response when the structure encountering the horizontal earthquake, vertical earthquake and coupling earthquake. When the structure encounters the coupling earthquake;when the change of strength of peripheral site soil arounding multideck metro station and different burying depth of the multideck metro station,the structure has different dynamic responses in the coupling earthquake.The results of the study shows that structure power response's influence is great in the vertical earthquake function,not allow to neglect.We should consider the level and vertical coupling earthquake function when designing.The interior column of multideck metro station are weak parts in structure stress.We should adopt corresponding structural measures when designing.The strength of peripheral site soil arounding multideck metro station has influence on structure's dynamic response.With surrounding site soil strength increasing,the dynamic response of structure becomes decreasing.With the burying depth of the shallowly buried underground structure increasing,it's seismic behavior improves.The conclusions have some referential value for the establishment and improvement of the seismic design method of the multideck metro station.