主管内填混凝土矩形和圆形钢管桁架受弯性能对比试验研究_刘永健.pdf

DO I :10.14006/j .j zj gxb.2010.04.011 31 4 2010 4 　JournalofBuildingStructures Vo.l31 No.4 Apr.20 10 0 11 :1000 -6869 (2010 )04-00 86 -0 8 1 2 1 刘永健 , 刘君平 , 张俊光 (1.长安大学桥梁与隧道陕西省重点实验室, 陕西西安 7 10064;2.福州大学 土木工程学 , 福建福州 35010 8) :, 、 : , , ;, , , , , ,, , :;;;;; :TU52 8.59　TU323.4　TU3 17.1　　:A ExpermientalresearchonRHSandCHStrusswith concretefilledchord 1 2 1 LIUYongjian, LIUJunping, ZHANGJunguang (1.KeyLaboratoryforBridgeandTunnelofShaanxiProvinc,eChang anUniversit,yXian710064, China; 2.CollegeofCivilEngineering, FuzhouUniversit,yFuzhou350108, China) Abstrac:tThepaperdescribesastudyontheeffectofconcretefilledchordinrectangularhollowsection(RHS)and circularhollowsection(CHS)steeltubetrus.sTestsontrussesmadewithRHSandCHSsteeltubewiththreetypes werecarriedou,twiththefirsttypespecmiensbeingRHSandCHStrusse,sthesecondtypespecimensbeingRHSand CHStrusseswithconcretefilledinthecompressivechord, andthethirdtypespecimensbeingRHSandCHStrusses withconcretefilledinboththecompressiveandthetensionchord.sTestresultsindicatedthatallrectangularsection trussspecmiensfailedinthejoint.sThefailureofRHStrusswasduetothecompressivechordplastification, theother twowereduetotheflangepunchingfailuremodeoftensionchordwallwhichconnectedwiththetensionbranch.The CHStrussandCHStrusswithcompressivechordconcrete-insidefailedduetothechordplastification, whilethefailure oftheCHStrusswithbothchordconcrete-insidewasduetothetensionbracebroken.Concrete-filledinchordcannot onlyhelpreinforcingsteeltube, butalsoenhancethestrengthandrigidityofthejoint,sresultingintheincreaseofthe