
etjointsoftheprecastdeckslabsofthecurrentassembledcompositebeambridgesarewideandthecastingamoun
tforthejointsinsituislarge,akindoftheultrahighperformanceconcrete(UHPC)Ushapereinforcementwetjointofnarrowwidthwasproposed.Tocheckthemechanicalbehavi
oroftheproposedjoint,3deckslabspecimens(thespecimenJF1,theintegralconcreteslab,thespecimenJF2,theconcreteslabwith30cmwideUHPCUshapereinforcementjoi
ntandthespecimenJF3,theslabwith60cmwideordinaryconcreteUshapereinforcementjoint)weredesignedandprepared.Thestaticbendingtestsforthespecimensweremad
eandtheultimatebearingcapacity,crackingresistanceperformanceandbendingrigidityofthespecimenswascompared.Theresultsindicatethatthebendingbearingcapac
ityofthe3specimensisapproximateandthefailuremodesareallthebendingshearfailureintheshearspanareas.Thewetjointsofthespecimensdonotweakenthebendingbearin
gcapacityofthedeckslabsandtheUHPCcansignificantlyimprovethecrackresistanceperformanceofthejoints.Theload~displacementcurvesofthespecimensarebasically
thesame,thebendingrigidityisbasicallyidenticalandtheinfluenceofthejointsonthebendingrigidityislittle.ThespecimensJF2andJF3havetheequalbendingstrengt
handrigidityandtheUHPCcanbe收稿日期:2018-01-17基金项目:重点研发计划项目(2017YFC0703408)ProjectofNationalKeyResearchandDevelopmentProgramofChina(2017YFC0703408)作者简介:
张永涛,教授级高工,Email:18183001@qq.com。研究方向:装配式桥梁,大跨结构桥梁。预制桥面板UHPCU形钢筋湿接缝受力性试验研究张永涛,田飞49usedasthecastingmaterialforthejointstoreducethewidthofthejoints
.犓犲狔狑狅狉犱狊:assembledbeambridge;precastdeckslab;wetjoint;Ushapereinforcement;ultrahighperformanceconcrete;mechanicalbehavior;teststudy1引言装配式组合梁桥是种在工
厂预制钢梁和混凝土桥面板,再将其运至施工现场进行快速拼装的组合桥梁体系。为了减少桥梁建设过程对交通的干扰以及对环境的不利影响,美国在20世纪80年代率先启动了桥梁快速施工计划(AcceleratedBridgeConstruction,简称ABC),使装配式组合桥梁得到广泛应用[1]。近年来,我国钢
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