裝配式混凝土空心板梁橋整體化加固的試驗研究.pdf

1、東南大學博士學位論文裝配式混凝土空心板梁橋整體化加固的試驗研究姓名：俞博申請學位級別：博士專業(yè)：土木工程；橋梁與隧道工程指導教師：葉見曙20110531東南大學博士學位論文ABSTRACTPrecastconcreteadjacentboxgirderbridgesarewidelyusedonChinasnationalhighwaysandcitymadsInrecentyears，howeversuchbridgesarcpron

2、etothedevelopmentoflongitudinalcracksinthedeckslabwherethecracksareobservedabovethelongitudinalshearkeyjointsbetweenadjacentbox—beamsOnaccountofappearingsuchdiseases，themethodofintegrativereinforcementforprecastconcretea

3、djacentboxgirderbridgeswasresearched11圮mainresearchcontentsandresultsareasfollows：Basedontheideaofsuperstructureintegrativereinforcement，themethodofintegrativereinforcementthroughtransverseposttensioningwasproposedontheb

4、asisofrepairingshearkeydamage，tomakeprestressing謝tllimprovingforcestateonthesectionofshear—key，superstructure’SbehaviorofprecastconcreteadjacentboxgirderbridgesisclosetoanintegralplateundervehicleloadingAccordingtothestr

5、ucturalfeaturesofboxgirderandconcreteshearkey，fmitestripmethodwasstudiedandproposedtoconducttheirforceanalysisBythisfinitestripmethod，concreteshearkeyisregardedasanindependentelement塒tllsomerigidity，itsforcestatecausedby

6、shearforceandbendingmomentundervehicleloadingCannotonlyberevealedbutalsoquantitativelydescribedThroughtypicalbridgeloadingtestandsettingspecialobservationthefinitestripmethodprovesthatthevalueofbending(0rshearing)underta

7、kenbyboxgirderconcreteshearkeysshoulddivideintothepositiveandnegativeTheshearperformancetestWasdesignedindifferentformsTestresultsindicatethattheshearofshearkeybelongstothebondissueofpostcastconcrete，andthatshearstrength

8、canbeenhancedsignificantlythroughjointfacedabbing，reinforcinginshearkeyandaddinglateralpressureSummarizingtheresearchesofthispaperandtheotherpeopleaformulatocalculateshearstrengthofshearkeyWasproposedinoaseofnolateralpre

9、ssure；anotherformulatocalculateshearcapacityusingthefriction—shearprincipleWasalsecommendedincascofreinforcingandaddinglateralpressure，whichcanbeappliedtobothintegrativereinforcingdesignandnewshearkeydesign11艙precastconc

10、reteadjacentboxgirderbridgesuperstructureWaslikenedtoorthotropicplatenetransverseshearandbendingmomentsolutionswerederivedandtheirpeakvalueandspacedistributionruleswereanalyzedAccordinglydiagramsinaccordancewi山theJTGD602

11、004vehicleloadwereproducedwhichcanbeuseddirectlyandeasilybydesignerstofindthemaximumshearandbendingmomentoftheshearkeyMethodsofcalculationand&signofttmlSVerseposttensioningsⅥ旭：陀proposedforintegrativereinforcementofthepre

12、castconcreteadjacentboxgirderbridges，basedontheindoortestresultsoftransverseposttensioningsandanalysisresultsoflateralpressuredistributionruleonshearkeysection謝tllFEM，aswellasaccordingtodistributionruleoftheshearandmomen