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时间:2020-03-25
《汶川地震桥梁震害经验及抗震研究若干新进展.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第28卷第10期2011年lO月公路交通科技JournalofHighwayandTransportationResearchandDevelopmentV01.28No.100c1.201ldoi:10.3969/j.issn.1002—0268.2011.10.009汶川地震桥梁震害经验及抗震研究若干新进展王东升1,孙治国1,郭迅2,李晓莉1,霍娥1(1.大连海事大学道路与桥梁工程研究所,辽宁大连116026;2,中国地震局工程力学研究所,黑龙江哈尔滨150080)摘要:2008年5月12日我国四川省汶川县发生8.0级大地震,造成大量公路桥梁破坏,并为桥梁抗震研究留下了众多资料。总结
2、了汶川地震桥梁震害经验,认为宜重视桥梁近断层地震动响应及防落梁措施、小半径曲线梁桥地震防倒塌设计、桥梁延性抗震设计及细部配筋和深水高桥墩地震损伤及控制等抗震问题。综述了课题组近些年对桥梁抗震研究的若干新进展,包括梁式桥防落梁抗震设计理念及方法、钢筋混凝土桥墩地震抗剪强度及变形能力研究、曲线梁桥地震破坏机理数值分析与小半径曲线梁桥地震防倒塌设计对策等。关键词:桥梁工程;汶川地震;震害经验;曲线梁桥;桥墩;落梁;近断层地震动中图分类号:U442.5+4文献标识码:A文章编号:1002—0268(2011)10一0044一lOLessonsLearnedfrOmWenchuanSeismicD
3、amagesandRecentResearchonSeismicDesignofHighwayBridgesWANGDongshen91,SUNZhign01,GUOXun2,LIXiaolil,HUOYil(1.InstituteofRoadandBridgeEngineering,DalianMaritimeUniversity,DalianLiaoning116026,China;2.InstituteofEngineeringMechanics,ChinaEarthquakeAdministration,HarbinHeilongjiang150080,China)Abstrac
4、t:ThegreatWenchuanearthquake,whichmeasureda88.0MsandoccultedonMay12,2008inSichuanprovinceofChina,hascausedseveredamagetomanyhighwaybridgesandalsoleftUSwithvaluableinformationthatcanbeanalyzedtoreducepotentiallossesassociatedwithfutureearthquakes.TheLessonslearnedfromWenchuanseismicdamagesofhighwa
5、ybridgesweresummarized.Itisbelievedthatspecialattentionshouldbepaidto(1)bridgeseismicresponseandunseatingdamagessubjectedtonear—faultgroundmotions;(2)preventivedesignofcollapsedamageofcurvedgirderbridgeswithsmallradius;(3)ductilityandseismicdesign,detailedreinforcementofbridgesandseismicdamagecon
6、trolofhish-risepiersunderdeepwater.Therecentresearchprogressofourresearchteamonseismicperformanceofhighwaybridgeswassummarized.Itincludesdesignideaandmethodofunseatingprotectionofhighwaybridges,deformationcapacityandshearstrengthofPCbridgepiers,numericalsimulationbfseismicdamagemechanismofcurvedg
7、irderbridges,andcountermeasurestopreventcollapseofcurvedgirderbridgeswithsmallradius.Keywords:bridgeengineering;Wenchuanearthquake;curvedgirderbridge;bridgepier;unseatingofbridgegirder;near—faultgroundmotion0引言2008年5月1
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