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1、西南交通大學(xué)碩士學(xué)位論文高墩大跨連續(xù)剛構(gòu)橋地震反應(yīng)分析姓名：胡步毛申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：魏建東20080501西南交通大學(xué)碩士研究生學(xué)位論文第lI頁AbstractWi也thedevelopmentoftransportation，continuousrigid—framedbridgeswereextendedandappliedinbridgeengineering．Thesebridges剮孵lifelineengineering，oncedestroyed，itwill嘶nggreateconomiclosses．It
2、isnecessarytomakeananalysistotheseismicresponseofcontinuousrigid-framedbridges．Inthisthesis，takingYujiangbridgeastheresearchobject，basedonthebasictheoryoftheseismicresponseanalysis，twomethodsincludingresponsespectrumandtime-historyanalysisofearthquakeareappliedtoacontinuousrigid
3、—framedbridge．Themaincontentinthisthesisincludes：1．Establishingfourcalculationmodelsofthebridge；consideringtheinfluenceofthepile—soilinteractionanddifferentsubstructure；analyzingthedynamiccharacteristicsofthefourmodelsrespectively．2．Theseismicresponseofthefourmodelswereanalyzedb
4、yresponsespectrumanddynamictime-historyanalysismethods．Bychangingthespeedoftheearthquakewave，thetraveling-waveeffectwereanalyzed．3．Theinfluencesoftheverticalseismiceffect，pile—soilinteractionandtraveling—waveeffectofearthquakewavewerediscussed．Theresultsofseismicresponsebetweent
5、hesinglethin—wallpiersmodelandthedoublethin-wallpiersmodelwerecompared．111emainconclusionsfromaboveinclude：(1)Settingdoublethin-wallpierschangesthesequenceofthevibrationmodeofthebridge，reducesthenaRffalfrequencyofthebridge，decreasestheshearandmomentofthebridgeandincreasestheaxia
6、lforceofthepiers．(2)Thepile-soilinteractionreducesthenaturalfrequencyandincreasesthedisplacementresponseofthebridge．(3)Comparedwiththeresultsofseismicresponseobtainedbyresponsespectrum，theresultsobtainedbytime—historyanalysismethodincreasesordecreases，weshouldadoptthelargerresul
7、twhendesign．(4)Theinternalforceandthedisplacementofthebridgeincreasesordecreases謝tIlthedifferenceofthespeedoftheearthquakewave，weshouldchoice。西南交通大學(xué)碩士研究生學(xué)位論文第1lI頁thecorrespondingspeedoftheearthquakewaveaccordingtotheactualgroundsoilwhendesign．Itisexpectedtogivesomereferencesforp
8、racticalseismicdesignofsimilarbridges．Keywords：
