Hits:

Date of Publication:2010-01-01

Journal:四川大学学报 工程科学版

Volume:42

Issue:5

Page Number:271-276

ISSN No.:1009-3087

Abstract:In order to study the effect of vertical seismic on the dynamic response
   of underground structures, the nonlinear seismic response analysis of a
   certain metro tunnel in soft sites was carried out.In the numerical
   analysis, a dynamic nonlinear viscoelastic model was used to model the
   characteristics of soils under cyclic loading, and the dynamic plastic
   damaged model of concrete was selected to model the characteristics of
   tunnel lining.The finite element model was established with dynamic
   viscoelastic artificial boundary, and the nonlinear seismic response
   analysis of the model was carried out with the bottom imposed horizontal
   or two-direction seismic wave.The result showed that the vertical
   earthquake wave has a great influence on the relative displacement
   between tunnel top and tunnel bottom, the stress of tunnel and the
   vertical acceleration at tunnel bottom.Therefore, the effect of vertical
   earthquake can not be ignored in engineering design

Note:新增回溯数据