Research On Seismic Response And Seismic Design Method Of Subway Station Complex

As an important part of urban rail transit,subway stations provide great convenience for the lives of urban residents.The comprehensive subway station is an upgraded version of the subway station,which not only exerts the transportation capacity but also can promote the development of the surrounding economy,but there is no targeted seismic research on this type of structure.This paper mainly studies the seismic calculation method of the subway station complex structure and the analysis of seismic influencing factors.Firstly,the simplified method of seismic response acceleration of comprehensive subway station structure is discussed and verified by dynamic time-history analysis.Secondly,the influence of structure type and relative position of subway station and adjacent underground structure on the seismic response of the station is discussed.This article studies as follows:(1)Earthquake resistance of subway station complex structure Due to the existence of adjacent structures around the station,the station complex model cannot simply use the seismic calculation method of underground structure.Generally,a more tedious time-history analysis is used.For this problem,this paper proposes to consider the impact of adjacent buildings Simplified calculation model and calculation method of seismic response of underground structure of subway station.Simplify the above-ground structure,that is,apply the internal force to the underground structure,so that the reaction acceleration method can be used to calculate and analyze the above-ground overall model,reducing the amount of calculation and difficulty.This paper selects a variety of seismic wave data and compares the response acceleration method with time history analysis to verify and summarize the simplified calculation model and method proposed.The feasibility of the simplified response acceleration method is obtained,which involves the seismic problems of the subway station complex.(2)The two seismic influencing factors for the symmetry of the side column of the subway station and the adjacent column of the adjacent structure and the symmetry of the adjacent underground structure are analyzed.First,the internal force of the station is also significantly increased,so the design should avoid co-columns of the station and its adjacent structure;secondly,for the symmetry of the adjacent underground structure,under the earthquake,there are adjacent underground structures on both sides of the station The adjacent underground structure on one side is much more stable.In the asymmetric case,the side column of the station near the soil body bears greater shear and bending moments,and the internal force of the structure also increases significantly.This is also due to the difference in the stiffness of the two sides of the station The larger size makes the structure torsion and collapse during the earthquake,so the adjacent structures of the station should be distributed as symmetrically as possible in the design.(3)The influence of the relative position of the subway station and the adjacent underground structure is analyzed.First,the internal force change caused by the change of the horizontal relative distance between the subway station and the adjacent underground structure is analyzed.The trend has gradually stabilized,which indicates that the dynamic interaction between the two structures will also disappear when t he distance is far enough.Secondly,the effect of the adjacent underground structure on the internal force of the station when the depth of the subway station is different is considered.The internal force of the component increases significantly,especia lly the axial force of the column increases rapidly with the increase of the overburden pressure,so special attention should be paid to the seismic design of the column.