方鋼管約束高強(qiáng)混凝土軸壓短柱力學(xué)性能的試驗研究.pdf

1、哈爾濱工業(yè)大學(xué)碩士學(xué)位論文方鋼管約束高強(qiáng)混凝土軸壓短柱力學(xué)性能的試驗研究姓名：邢濤申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：張素梅20050101AbstractTheusesofhighstrengthconcreteincolumnshavegainedpopularityinmostofmodernbuildingconstructionsThisapplicationhasresultedinincreasedcolumnstr

2、engthandreducedcolumnsizethatcanprovidesignificantstructuralandeconomicbenefitsItwasnotedthathighstrengthconcretehastheeffectofreductionofductilitywiththeincreaseinstrengthTheeffectCallbereducedbyprovisionoflateralconfin

3、ementtotheconcreteUsingsquaresteeltubeinconfinementwasfoandtobecontractuallyfeasiblecomparedtoothersbutofferlessductilitycomparedtothatprovidedbycirculartubesManyresearcheshavebeenconductedtofindthewayovercomingthisprobl

4、emThispaperpresentedaresearchoncharacteristicsofhighstrengthconcreteconfinedbysquaresteeltubesTheworkincludesanexperimentalinvestigationof11squareshortcolumnspecimenstestedunderaxialmonotonicloadappliedtotheconcretesecti

5、onThemethodofloadapplicationwasattainedbymakingtwo10mmcutsaroundthespecimen30ramfromthetopandbottomplatesofthespecimenAmethodwasdevelopedtoreducethedifficultyindatacollectionafterpeakloadAcomputerizeddatasystemwasapplied

6、inordertofacilitateenoughdatacollectionafterpeakloadThemodeoffailurewasobservedandcomparedwithotherresearchesTheparametersofexperimentincludedsteelratio，confinementratio，andsteelyieldstrengthThecurvesofload—longitudinals

7、trainrelationship，load—horizontalstrainrelationshipandload—displacementrelationshipwerepresentedThecurvewasusedincalculationofproportionlimitstrain，proportionallimitbearingcapacityyieldingstrain，yieldbearingcapacityultim

8、atestrainandultimatebearingcapacityandanalysisofpostpeakbehaviorTheresearchshowedthistypeofcompositestructureswasefficienttogethigherstrengthofconfinedconcretethanthatofthecommonCFSTcolumns，aswellastheimprovedductilityto