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1、西南交通大學碩士學位論文高墩大跨連續(xù)剛構橋幾何非線性分析姓名：張勇申請學位級別：碩士專業(yè)：橋梁與隧道工程指導教師：趙人達20080401西南交通大學碩士研究生學位論文Abstract第1I頁Intherecentyears，long—spanbridgewithhigh·pierhasbeengrowinguprapidlywiththedevelopmentoftransportationenterprise．Longspancontinuousrigidframebridgewiththin-walledhighpiers’iscommonlybuiltinCh
2、ina，owningtotheiradvantagesoneconomyandconstruction．However，thestabilityproblemofthebridge，especiallyinthestageofcantileverconstructioniSmoreremarkable．Thenonlinearbehaviorofbridgebecomesmoreandmoreimportantwiththeincreaseofitsspanandpierheight．Thisthesisillustratesthegeometricalnonlin
3、eartheoryofbarssystem，introducesthespatialdescriptionmethodsofstructuralshapesofgeometricalnonlinearbehaviorandemphasizesthediscriminationbetweenTotalLagrangianFormulationandUpdatedLagrangianFormulationinLagrangianFormulation．BasedonLabajinBridge，thisthesisfocusesonthenonlinearofcontin
4、uousrigidframebridgewithhighPiersduringtheconstructionofcantilever，byuseoffiniteelementprogramMidas／Civil．ThecalculationindicatesthatgeometricalnonlineareffectaffectsobviouslytoY—directiondisplacementofthebridge，throughstraight、curvedandsinglelane、doublelanesofthecomparison．Inthestraig
5、htbridgeandthecurvedbridgestructure西南交通大學碩士研究生學位論文第111頁---●_●●_●_●●●●—__—●●_●_-●-●_●●-●●-____●●●___●__●__●●_-●●●-_●_●_II——_m__●●_●-thereisverybigdifferenceinthedisplacementdistortionandthestructurestress．ThestraightbridgedoesnothavethelateraldisplacementandtheZdirectionbendingmoments．b
6、utthecurvedbridgecanhavethelateraldisplacementandZdirectionbendingmomentS．Thereisverybigdifferencebetweenthelinearandnonlinearanalysisresults，whichshowsthatthehigh—pierandlong—spanbridgeisverynecessarytoconsidergeometricalnonlinearanalysis．Keywords：high—pier：long—spancontinuousrigidfra
7、mebridge；geometricalnonlinear西南交通大學學位論文版權使用授權書本學位論文作者完全了解學校有關保留、使用學位論文的規(guī)定，同意學校保留并向國家有關部門或機構送交論文的復印件和電子版，允許論文被查閱和借閱。本人授權西南交通大學可以將本學術論文編入有關數據庫進行檢索，可以采用影印、縮印或掃描等復制手段保存和匯編本學位論文。本學位論文屬于1．保密口，在年解密后適用本授權書；2．不保密囹，適用本授權書。學位論文作者簽名：彩蠶日期川，／．／?燧名：趣穆日期漲．“西南交通大學學位論文創(chuàng)新性聲明本人鄭重聲明：所呈交的學位論文，是在導師指導下獨立進行研
