The Analysis Of Seismic Response Of Underground Subway Structure To SV Waves

With the rapid development of economics in china, the construction of subway receives its golden age, however, the seismic design standard has not yet former, and the related standard available doesn't take the dynamic concentration problem of subway structure under seismic loading into account. Researches on the dynamic concentration problem of substructure are mainly concerned with spherical or ellipse cavern, no result on sub-rectangle cavern is gained. In this paper, researches on the dynamic concentration index of sub-rectangle cavern together with displacement and internal force in subway are carried out, and the achievements are as follows:Firstly, three-dimensional problem is transferred into plane problem, and the substructure of subway is also simplified; common artificial boundaries are compared, and the elastic dynamic artificial boundary is successfully applied to the large finite element programme ADINA, and the effective input of seismic SV wave into the artificial boundary is also realized.Secondly, the influence of structural and incidence wave property, the embedded depth on the dynamic concentration index is researched.Finally, research on the influence of structural and incidence wave property, the embedded depth on the displacement and internal force under seismic loading is carried out.The above research work could be used as a reference for the seismic design of substructure and related standard.