中国铁道科学2018，Vol.39Issue(1)：49-58,10.DOI:10.3969/j.issn.1001-4632.2018.01.07
顺层岩体各向异性对隧道地震响应的影响
Influence of Bedding Rock Mass Anisotropy on Tunnel Seismic Response
摘要
Abstract
In order to study the influence of bedding rock mass anisotropy on tunnel seismic response,an input method of two-dimensional plane seismic waves incident on the bottom of tunnel was established based on the time-domain wave theory of visco-elastic boundary,considering the transverse isotropic constitutive relation of bedding rock mass as well as the variation characteristics of the polarization and phase velocity of the seismic waves in bedding rock mass.A high speed railway tunnel in a bedding rock mass was used as the engineering background.Numerical analysis was carried out on the seismic response by using ANSYS software to study the influence of the anisotropy strength of rock strata on the seismic response asymmetry or non-antisymmetry of tunnel when the plane seismic waves incident on the bottom of tunnel.Results show that,when the seismic qP wave is incident,with the enhancement of rock anisotropy,the asymmetry of seismic response at the same time increases gradually as a whole and obeys the approximate linear relationship.However,there is no clear and unified law for the internal force envelope of seismic response,depending on the dip angle of rock stratum.When the seismic qSV wave is incident,the non-antisymmetry of seismic response lacks a uniform and definite law with the change of rock anisotropy,depending on the dip angle of rock stratum.关键词
隧道/顺层岩体/岩层倾角/岩层各向异性/地震响应/地震波Key words
Tunnel/Bedding rock mass/Dip angle of rock stratum/Rock anisotropy/Seismic response/Seismic wave分类
交通工程引用本文复制引用
胡鸿运,周晓军,汪精河..顺层岩体各向异性对隧道地震响应的影响[J].中国铁道科学,2018,39(1):49-58,10.基金项目
国家自然科学基金资助项目(51378436) （51378436）
