鋼管自應(yīng)力免振混凝土力學(xué)性能研究

1、大連理工大學(xué)碩士學(xué)位論文鋼管自應(yīng)力免振混凝土力學(xué)性能研究姓名：姜德成申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：黃承逵20071201鋼管自應(yīng)力免振混凝土力學(xué)性能研究ResearchonMechanicalBehaviorofSelfstressingandSelfcompactingConcreteFilledSteelTubeAbstractIntherecentdecades，theconcretefilledsteeltube(C

2、FSnismollandmolewidelyusedinconstructionofprojectsThefunctionofconcreteandsteeltubecanbefullyexertedinconcretefiliedsteeltubestructure，whichshowsexcellentmechanicalperfommceButthestructureofCFSTstillhassomedrawbacksForex

3、ample。itisdi伍culttotampafterpouring。shrinkageandcreepinconc柑tehardeningwilldecreasetherestrainingforcen地technologyofselfstressingcencreteandthetechnologyselfcompactingconcreteareappliedtoCFSTthatcanmakeconcretecoreunifor

4、mandcompactInthesametime，SelfstressingconcretecoilproducesvolumeexpansionwhilehydratingConcretecorerestrainedbysteeltubeiscompressedinthr@edffecfionsComparedwithordinaryCFSTthemechanicalperformanceofserfstressingconcrete

5、filiedsteeltubeisimprovedAsapartoftheprojectoftheoreticalresearchonselfstressingconcreteandselfcompacgngconcretefilledsteeltube(NO50578027)fundedbyNationalNaturalScienceFoundation，thespecificinvestigationarecarriedoutasf

6、ollow：(1)DifferentmixtureproportionofselfstressingandselfcompactingconcreteissuccessfullycompoundedThetestrcsultsshowthatthestrengthofselfstressingconcretemadeofsulphoaluminateexpansivecementdevelopsveryfastinearlyageand

7、releasemuchheat111ecompactnessanduniforrnityoftheconcretearegoodTheperformanceofseIfstressconcreteunderfreeexpansionconfinedexpansionistestedandtofindtheirinfluencingfactorsTheresultsindicatethattheexpansionofsel矗stressc

8、oncretchasacloseconnectionwiththemixtureproportionandtheproportionofcementisthemainfactorMixtureproportionofcementsteelratioandslenderratioaffectselfstress伊eatly(2)111cpushomtegtsofseventeenselfmessingconcretefilledcircu

9、larsteeltubesandthilenormalconcretefiUedcircularsteeltubesshowthatthestrengthofbondbetweenselfstressingconcreteandsteeltubeismuchhigherthantheordinaryconcreteandsteeltubeSelfstresscanimprovetheconditionoftheinterfacebetw

10、eellconcreteandsteeltube，andwiththeselfSll汜SSincreasingthebondstrengthbecomehigher(3)Inadditionthetestsoftwelveselfstressingconcretefilledcircularsteeltubesandthreenormalconcretefilledcircularsteeltubessubjectedtopureben