软硬交互场地盾构隧道纵向地震反应动力子结构法

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关键词：纵向不均匀场地；大直径盾构隧道；纵向地震反应；动力子结构法；地震震害 中图分类号： U452.2+8 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202409052

Dynamic sub-structure method for longitudinal seismic response ofa shield tunnel crossing soft-hard interlayered sites

LI Xiaoxiong¹， ZHUANG Haiyang1²， ZHAO Ronghua¹， ZHAO Kai¹， CHEN Guoxingl （1.Institute of Geotechnical Engineering，Nanjing Tech University，Nanjing 21Ooo9，China; 2.School of Civil Enginering and Architecture，East China Jiaotong University，Nanchang 33Ool3，China）

Abstract：Basedonthebasicconceptofthegeneralizedresponsedisplacement method，adynamicsub-structureanalysismethod suitableforthelongitudinalseismicresponseofashieldtunnelcrossinglongitudinallyunevensitesisproposed.Anexplicitpaalel calculationmodelofthelongitudinalunevefrefieldadathdimensional（3D）refidexplicitparallelcalulationmodelofthe surroundingrock-shieldtunnelsystemareestablishedbyusingthenewlyproposedsub-structureanalysis method.Thereal-time transmisionofdynamicdeformationbetweenthetwomodelsontheboundaryisachievedthroughthesub-structure method.The fre-fieldseismicwaveattheburiddpthofthetunelistransformedintotheequivalentearthquakeactionoftesurroundingrock shield tunnelsub-structure model.Compared withthe traditional beam-spring model，themodelmethod inthis papercanachieve the 3Drefined simulationof thesuroundingrock-tunnel systemandthelongitudinal non-uniformground motioniput along the tunnelcausedbythesitesesmicefect.Thereliabilityofthemodelmethodintispaperisverifiedbyomparingitwiththecalculationresultsof the3Drefinedanalysismodeloftheshieldtunnel.Theresultsshowthatthe modelmethodinthispaperhasaclear concept，simplemodeling，lowcalculationcostandsmalliferencesinresults，whichcanfullyreflect thelongitudinalseismicre sponseofshieldtunnelcrossinglongitudinalunevensites.Itprovidesamoreefcientanalysis methodforthelongitudinalseismic design of shield tunnels crossing longitudinal uneven sites with soft-hard connected media.

Keywords：longitudinal uneven sites;arge-diameter shield tunnel;longitudinal seismic response;dynamic sub-structure method; earthquake damage

随着城市轨道交通的快速发展和沿江沿海城市群的协调发展，盾构隧道已成为了现代化交通设施的主要组成部分[1-2]。（剩余13577字）