主管内填混凝土的矩形钢管X型节点受拉和受弯性能试验研究_刘永健.pdf

DO I :10.14006/j .j zj gxb.2009.01.012 30 1 2009 2 　JournalofBuildingStructures Vo.l30 No.1 Feb.2009 0 12 :1000-6869 (2009 )01 -0082 -05 X 1 2 1 刘永健 , 周绪红 , 刘君平 (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.兰州大学土木工程与 学学院, 甘肃兰州730000 ) : X, 4 X 1 X , γ。, ,,, γ , 、 γ,, ;, , 。, X。 :;;X;; :TU52 8.59　TU317 .1　　:A ExpermientalresearchonrectangularsteeltubeX-jointswithchord concrete-insidesubjectedtotensionandbending 1 2 1 LIUYongjian, ZHOUXuhong, LIUJunping (1.KeyLaboratoryforBridgeandTunnelofShaanxiProvince, Chang anUniversity, Xian7 10064, China; 2.SchoolofCivilEngineeringandMechani,cLanzhouUniversit,yLanzhou730000, China) Abstrac:tTostudythebehaviorofrectangularsteeltubularjointswithchordconcrete-insid,ethetestsof4 specimens ofconcretefilledrectangularsteeltube(CFRST)X-jointsand1 specmiensofhollowrectangularsteeltube(HRST) werecarriedoutundertensionandbendingloadingcondition,srespectively.Themainexpermientalparametersstudied werethewidthratioofbranchtubeandchordtubeandtheratioofwidthandthicknessofchordtubeγ.Testresults showedthatfilled-inconcreteofchordtubecanimprovethemechanicalbehavio,renhancetherigidityandbearing capacityofthejoint.sSimilartotheHRSTjoint,stheparametersofandγarethemainfactorswhichinfluencesthe behavio,randthebearingcapacityandrigidityofCFRSTjointsbecomelargerforalargerandsmallerγ.Duetothe restrictionoffilled-inconcretetothewebofchordtub,ethefailuremodeofCFRSTjointsaredifferentcomparedwith theHRSTjoint.sThebearingcapacityformulaarerecommendedfortheCFRSTjointsaccordingtothefailuremode. Keyword:srectangularsteeltube;concretefilledrec