考虑土层切向剪力作用的大直径竖井结构水平地震响应解析解

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关键词：地下结构抗震；大直径竖井；土-结动力相互作用；地震响应解析解中图分类号：TU91；U451 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202307051

Analytical solution of horizontal seismic response of large-diameter shaft structure consideringsoil tangential shearforce

ZAHNG Bu1²，LU Lidong¹，CHEN Zhiyi³4，DU Xiuli1，2² （1.Collegeof Architecture and Civil Engineering，Beijing Universityof Technology，Beijing lOOl24，China; 2.KeyLaboratoryof Urban Securityand DisasterEnginering，MinistryofEducation，Beijing Universityof Technology， Beijingl0ol24，China；3.College ofCivil Engineering，Tongji University，Shanghai 2Ooo92，China; 4.State KeyLaboratory of Disaster Reductionin Civil Engineering，Tongji University，Shanghai 2Ooo92，China）

Abstract：Seismic experiencehasshownthatunderground shaft structuresare subjected toseismic threatsandsevere examplesof damage have occurrd.Inorder toobtainthe seismic responseof the shaft，the‘beam-spring’modelwas used toestablishasys temanalysismodelforthedynamicinteractionbetweenthearge-diametershaftandthesoilbasedonthePasterakfoundationand theTimoshenkobeam theory.Onthebasisofconsideringthenormalearth presureofsitesoillayerandshaftstructure，thetangen tialshearforceofsitesoillayerandshaftstructureisfurtherconsidered.Theanalyticalsolutioofseismicresponseoflargediame tershaftunderhorizontalearthquake wasstudied.Thepeak seismicresponseoftheshaft along thedepthdirectionisanalyzed from theaspectsoftheratioofthelengthtodiameteroftheshaft，theratiooftheinerandouterdiameters，theratiooftheelasticmodu lusoftheshaftothesiteandtheboundaryconditionsatthebotomoftheshaft.Theresultsshowthatthedecreaseoftheratioof thelengthtodiameteoftheshaftwilleadtotheincreaseofthepeakresponseoftheintealforceofteshaftalongthedepthdirection.Theincreaseoftheinnerandouterdiameterratiooftheshaftwillrducethepeak interalforceresponseoftheshaftalong thedepthdirection.Withtheincreaseoftheratiooftheelasticmodulusoftheshafttothesite，thepeakresponseofthenternal forceoftheshaftalongthedepthdirectionwillgraduallyincrease.Thedisplacementresponseofthesaftundertheelasticsoilfoun dationislargerthanthatoftherock-socketed foundation.Theshearresponseundertheocksocketedfoundationalongthedepthdi rectionoftheshaftissignfcantlylargerthanthatoftheelasticsoilfoundation，andthebending momentpeakresposeofherock socketed shaft at the bottom position is larger.

Keywords：seismicresistanceofundergroundstructures;argediametershaft;soilstructuredynamicinteraction;analyticalsolutio of seismic response

地下竖并结构作为地下空间中常见的结构形式之一，被广泛应用于城市地下空间开发、地下停车场、深隧防洪排涝竖井、地铁和隧道通风井等城市地下基础设施中。（剩余13051字）