大跨高墩连续刚构铁路桥的稳定性分析

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1、西南交通大学硕士学位论文大跨高墩连续刚构铁路桥的稳定性分析姓名：董伟申请学位级别：硕士专业：桥梁与隧道工程指导教师：魏建东20090301西南交通大学硕士学位论文第1I页ABSTRACTBecauseofhighpierandlarge-spancontinuousrigidframebridgehasbuilt，thestructureandoperationduringtheconstructionofthestudyofstabilityhasbecomeahottopic．Oncetheworldhasalotofbridgesbecauseofinstabilityandloss

2、ofload-bearingcapacityoftheaccident,Bridgetheexistingregulationsdidnotspecificallynotethis，SOtodosomeresearchinthisareaisverynecessary．QingHegouBridgeislocatedinShanxiprovince，acrosstheQingHegouandtheQingdao—YinchuanHighwayforlong-spancontinuousrigidframehighpierstraightrailwaybridge，theuseof78+3×

3、134+78mprestressedconcreteboxgirder,beambodyasasinglebox，changingthestructureofhighlyvariablecross-section．Inthefulcrumofthehigh-9．3m,andincross-beamhighbeam4．8m，thehighestpierisupto103m,Inadditiontothestartingpointtheuseofduggingpilefoundation，theotherpiersare1．5mand2．0mdiameterpilefoundation．The

4、sissetuptwocomputingmodels，separatelyconsideredthepile-soilinteractionaswellastheconsolidationpileconnectionsofstructuralstability．Ordinaryreinforcedandprestressedsteelbeamaffectedthestabilityofthestructureatsuchathesisinthisarticleareaninnovation．Pre-stressedthanthosethatdonottakeintoconsideratio

5、ntheroleofthestabilityofpre-stressed，andabout7％，thegeneraleffectsofreinforcementstiffnessonthebridgeisverysmall，thestabilitycoefficientwillremainbasicallyunchanged．ThesisusingalargefinitesoftwareMIDAS／CⅣILcalculatedndanalyzedseparatelyaftercompletionofthemainpieratPierweight,verticalwindandhorizon

6、talwindloadofhighpierautologousstability,minimumstabilitycoefficient349．7：maximumcantileverpouringonthemainpieronstructionwhenthelargestcantileverintheverticalwind，horizontalwind，verticalwindload，deadloadandhangingbasketerroratthetimeofthelargestcantileverstabilityanalysis，theminimumstabilitycoemc

7、ient113．7；full-bridgecompletionAfterenteringthestageattheuseofself-respect,twodeadload，temperatureloading，intheliveload，thestabilityofprestressedcombined．minimumstabilityfactor125．3．Throughtheanalysis：thestructur