考虑承台效应的液化场地-群桩-上部结构地震反应分析

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中图分类号：TU443 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202402022

张小玲¹²，兰浩¹²，许成顺¹2

（1.北京工业大学建筑工程学院，北京100124;2.北京工业大学城市与工程安全减灾教育部重点实验室，北京100124）

Seismic response analysis of liquefied site-pile group-superstructure system considering pile cap effect

ZHANG Xiaoling1²，LANHao1²，XU Chengshun1² （1.CollgofArchitectureandCivilEngiering，BeijingUniversityofechology，Beijing24，China；2KeyLaboratoryofUban SecurityandDisasterEngineering，MinistryofEducation，Beijing UniversityofTechnology，Beijing 10o124，China）

Abstract：Inthispaper，basedoncentrifugeshakingtablemodeltestsofliquefidstepilefoundationsystem，anumericalodelofte liquefiedsite-lwpilecap-pilegroupsystemisestablisedbyusingOpenSes.Tenonliearcontactprobembetweenpilecapandsoilis realizedbystablsngialodsinumecalodeleectiveessoftumeicalsulatioetdusedtseisfd bythemonitorigsultsofcentrifugtestBasedonteverifidumericalodelingmetod，atodimensioaltegratedumeicalodel ofliquefidoltrucessabdiectalledsieesteckgodeeeoftedig depthofpilecap，tecontactofliquefactiooiopileapndteticknssofoverlyingsaturatedloosesandontheliquefidsoilpile foundationsystemisasodiscussedTeresultssowthatthepeakbendingmomentandresidualdispacemetofpileintehighpilecap-pile systemarelargerthantoseintelowpilecap-pilesystem.Theresultsof teresidualdisplacementandpeakbendingmomentatpilehead calculatedbythebondcontactmethodarehgherthantosecalculatedbythefrictionontactUnderdierentoverlyingsaturatedloosesand thickneses，thepeakbendingmomentbetweenthepileheadandthesoilinterfaceincreaseswiththeincreaseofthesoilthicke. Particularly，themutationofpeakbendingmomentattesolinterfaceisgraduallyobvious withtheicreaseoftesoilthicknes.

Keywords：liquefiable site;pile cap-soil friction contact; seismicresponse;numerical simulation

群桩基础抗震性能良好、承载力高，是工程中常用的基础类型。（剩余15926字）