預(yù)應(yīng)力混凝土梁橋的徐變下?lián)涎芯?pdf

1、西南交通大學(xué)碩士學(xué)位論文預(yù)應(yīng)力混凝土梁橋的徐變下?lián)涎芯啃彰痕秤駝偕暾?qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：李亞東20080501西南交通大學(xué)碩士研究生學(xué)位論文第1I頁AbstractAtpresent，mainproblemforprestressedconcretegirderbridgesintheworldisexcessiveanddurativedeflectiondownwardsatmidspanIt’Smeani

2、ngfulintheoryandapplicationtesearchtheinfluenceonlong—termdeflectioncausedbyconcertecreepandhowtocontrolitFirstly，thisthesisstartsfromthepointofconcretecreep，analysesthecreepmechanismandvariousfactorsinfluencingconcertec

3、reep，creeptheoriesandcorrespondingcalculationmethodsExceptforthoseabove，thedifferencesinspecificationsforconcretecreeparecomparedSecondly，theChongqingChangjiangRiverBridgeisreanalysedusingfiniteselementanalysessoftwareMI

4、DAS／CIVIL2006TherationalityofcomputationmethodsforconcertecreepisdiscussedbycomparingtheoreticalcomputationandactualdatameasuredforyearsThirdly，pretressing，concretecreepandbendingrigidityofboxgirderarestudiedtodiscussthe

5、irimpactsonthedeformationofgirderCurrentdesigntheoryand“ZeroMomentMethod”theoryareintroducedThedifferencesoftwotheoriesarecomparedbyabridgedesigncasetoenucleatetheexcellenceofthe“ZeroMomentMethod”theoryLastlythisthesisin

6、troducestheconstructioncontrolresultsfortheJiang’anChangiiangHighwayBridgeTheparametersforprestressdesignandpre。camberofgirderarediscussedandimprovedparametersaresuggestedThedevelopmentandapplicationofexternallypretressi