裝配式混凝土空心板梁橋整體化加固的試驗(yàn)研究.pdf

1、東南大學(xué)博士學(xué)位論文裝配式混凝土空心板梁橋整體化加固的試驗(yàn)研究姓名：俞博申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：土木工程；橋梁與隧道工程指導(dǎo)教師：葉見曙20110531東南大學(xué)博士學(xué)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