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1、ARTICLEINPRESSEngineeringStructures()–www.elsevier.com/locate/engstructCrackcontrolofacontinuouscompositetwo-girderbridgewithprefabricatedslabsunderstaticandfatigueloadsHyung-KeunRyua,∗,Young-JinKimb,Sung-PilChangaaSchoolofCivil,UrbanandGeosystem,SeoulNationalUniversity,RepublicofKoreabStruc
2、turalSystemResearchGroup,KoreaInstituteofConstructionTechnology,RepublicofKoreaReceived13October2005;receivedinrevisedform16June2006;accepted19June2006AbstractInthisstudy,anexperimentaltestonafull-scalemodelofatwo-spancontinuouscompositetwo-girderbridgewithprefabricatedslabswascautiouslycond
3、uctedandobservedinordertostudycrackcontrol.Inthetesting,afirstloadingwasappliedupto360kNandthenfatigueloadingtestproceeded.Lastly,staticloadingwasappliedupto900kN.Fromthetestresults,itisconfirmedthatthetwo-girdercontinuouscompositebridgewithloopjointsprefabricatedslabsshowscompositesectionbeha
4、viourforbothstrengthandstiffnessunderstaticandfatigueloads.Although,innegativemomentregions,cracksconcentratedatthecastinterfaceofthejointsbetweendecksabovetheinternalsupportandtheinitialcrackspacingisconstitutedbythedistancebetweenjoints,crackwidthscanbecontrolledappropriatelywithinanallowa
5、blecrackwidthinthedecksandtransversejointsofthecompositebridgewithprefabricatedslabsonaninteriorsupportunderserviceloads.MomentcurvaturerelationshiportheflexuralstiffnessbyEurocode4-2isstillusefulfortheestimationoftheeffectivestiffnessconsideringtensionstiffeningeffectsinthecompositebridgewit
6、hloopjointsprefabricatedslabs.c2006PublishedbyElsevierLtdKeywords:Crackcontrol;Continuouscompositetwo-girderbridge;Prefabricatedslabs;Loopjoint;Transversejoint;Staticandfatigueloads;Compositesectionbehaviour;Negativemomentregion;Crackwidth;Flexuralstiffnessofcompositesection1.Introductionval
7、ues.Prestressingmethods,however,areinconvenientanddoubtfulduetoprestresslossesbythelong-termbehaviourSteelandconcretecompositebridgesareveryattractiveofconcrete.Therefore,itisconsideredthatthecontrolofsolutionsforshortandmediumspanbridges.However,f
