鐵路預(yù)應(yīng)力曲線橋空間結(jié)構(gòu)分析.pdf

1、北方交通大學碩士學位論文鐵路預(yù)應(yīng)力曲線橋空間結(jié)構(gòu)分析姓名：鐘銘申請學位級別：碩士專業(yè)：橋梁與遂道工程指導(dǎo)教師：許克賓19990101jE方交通大學碩士掌位論文—————————_—————————————————J——————————————_————————————————————一一AbstractBasedontheflondeformablesectionhypothesisofthetorsionbendingtheoryof

2、thin—walledgirders，thepaperdealswiththespatialanalysisofprestressedconcretecurvedbridgesonrailwayItincludestwopartsPartorlediscussesthemethodofthree—dimensionalstructureanalysisofsimply—supporteddouble—TbeamsoncurveAcalc

3、ulatingmethodofcontinuousgirdersonelasticbraceispresented，thenthestructureanalysisofdouble—TbeamsoncurveismadeNamely，thediaphragmsaretreatedaselasticbraceandthebeamsascontinuousgirderontheelasticbraceBothofthebeam’Sjnter

4、nalforceundertheeccentricloadandthecorrespondinginternalforceofdiaphragmsarecalculatedbythismethodThestandardprestressedconcretebeams，whosespanis16m，20m，24mand32m，areexampledrespectivelytoanalyzetheinfluencesontheeccentr

5、iccoefficientofliveloadandtheinternalforceofdiaphragmbyfourfactors，thatisthetrainvelocity，thecurveradiusthebeamsan‘a(chǎn)ngementandthebridgespanAlsotheeccentriccoefficientofliveloadsbasedontheexistingcalculatingmethodwhichdoe

6、snottakeintoaccountthecouplingeffectofdiaphragmsandthefunctionoftol。sionarecomparedSuccessively，thestressofdiaphragmischeckedInllleend，somepracticalmagnificentconclusionsareobtainedandsomeimprovedmeasuretopreventthecrack

7、ingofdiaphragmsisploposedParttwotalksoverthemethodofstructureanalysisofplanecurvedbeamsonrailwayThetbJ。ec—dimensionalmembersofcurvedthin—walledbeamareusedtoanalyzecurvedgirderbridgeAllpossibletypesofjointdisplacementinsp