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1、西南交通大學(xué)碩士學(xué)位論文大跨高墩連續(xù)剛構(gòu)鐵路橋地震反應(yīng)分析姓名：萬(wàn)明申請(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20090301西南交通大學(xué)碩士研究生學(xué)位論文第1I頁(yè)AbstractInrecentyears，withthedevelopmentofbridgestructure，thespanbecomeslonger,theheightofpierbecomeshigherandhigher．a(chǎn)ndframeworkbecomesmoreandmoreflexible，whichpresentsmanynewproblemsinthestudiesontheaseis
2、micdesignoflong．spanbridge．Inseismicdesignandseismicassessmentofbridges，itisnecessaryforUStounderstanddynamicresponsesofbridgesunderstrongearthquakes，especiallytheresponsesofbridgeswithhighpiersorlongspan．dynamiccharacteristicoflong—spanbridgeswithlongnaturalperiodisverycomplicated．Tostudythei
3、nfluencesofdurationofstrongearthquakesonstructurescanhelpUScomprehendtheresponsesofstructuresandimprovetheirseismiccapacity．Inthisthesis，takingQinghegouBridgeastheresearchobject，basedonthebasictheoryoftheseismicresponseanalysis，twomethodsincludingresponsespectrumandtime—historyanalysisofearthq
4、uakeareappliedtoacontinuoUSrigid．framedbridge．Themaincontentinthisthesisincludes：1．Establishingthreecalculationmodelsofthebridge；consideringtheinfluenceofthepile．soilinteractionanddifferentfoundation；analyzingthedynamiccharacteristicsofthethreemodelsrespectively．2．Theseismicresponseofthefourmo
5、delswereanalyzedbyresponsespectrumanddynamictime—historyanalysismethods．Bychangingthespeedoftheearthquakewave，thetraveling-waveeffectwereanalyzed．3．Analysethedifferenttypesofseismicwavesontheimpactoftime-historyanalysis，andpointedOUtthesolution．4．TheinfluencesoftheverticalseismiceffectwasdiscU
6、Ssed．Themainconclusionsfromaboveinclude：(1)Thepile—soilinteractionandthedeformationofthefoundationreducethenaturalfrequencyandincreasesthedisplacementresponseofthebridge．(2)Comparedwiththeresultsofseismicresponseobtainedbyresponsespectrum，theresultsobtainedbytime-historyanalysismethodincreases
7、ordecreases，weshouldadoptthelargerresultwhendesign．西南交通大學(xué)碩士研究生學(xué)位論文第1II頁(yè)(3)Theinternalforceandthedisplacementofthebridgeincreasesordecreaseswiththedifferenceofthespeedoftheearthquakewave，weshouldchoicethecorrespondingspeedoftheearthquake
