大跨高墩连续刚构铁路桥地震反应分析

《大跨高墩连续刚构铁路桥地震反应分析》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、西南交通大学硕士学位论文大跨高墩连续刚构铁路桥地震反应分析姓名：万明申请学位级别：硕士专业：桥梁与隧道工程指导教师：魏建东20090301西南交通大学硕士研究生学位论文第1I页AbstractInrecentyears，withthedevelopmentofbridgestructure，thespanbecomeslonger,theheightofpierbecomeshigherandhigher．andframeworkbecomesmoreandmoreflexible，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．西南交通大学硕士研究生学位论文第1II页(3)Theinternalforceandthedisplacementofthebridgeincreasesordecreaseswiththedifferenceofthespeedoftheearthquakewave，weshouldchoicethecorrespondingspeedoftheearthquake