引氣混凝土收縮徐變及實(shí)驗(yàn)梁研究.pdf

1、圖書分類號(hào)：U444UDC：624工學(xué)碩士學(xué)位論文Y8212鴟二引氣混凝土收縮徐變與實(shí)驗(yàn)梁研究碩士研究生：導(dǎo)VS申請(qǐng)學(xué)位：學(xué)科、專業(yè)：所在單位：答辯日期：授予學(xué)位單位：楊圣超張樹仁教授工學(xué)碩士橋梁與隧道工程交通科學(xué)與工程學(xué)院2005年11月哈爾濱工業(yè)大學(xué)望璽簍三些查蘭三耋堡圭蘭堡簍耋AbstractBecauseofwentwithoutanexistingdesigncriterion，airentrainedconcretecall

2、’tbecorkingapplied，ahhoughitshighdurabilityhasbeenprovedAccordingtotheabovementionedangles，thispaperstudyoncreep，bendingstrengthandshearstrengthofairentrainedconcrete18specimenswereexperimentallyoncreepinvestigated，chang

3、esofaircontent，intensitygrade，andloadtimeareconsidered，16beamswereexperimentallyonbendingstrengthinvestigated，changesofaircontent，intensitygrade，andtheratioofreinforcementareconsidered22beamswereexperimentallyonshearstre

4、ngthinvestigated，changesofaircontent，theratioofshearspantodepthintensitygrade，andtheratiooflongitudinalreinforcementaleconsideredMultifoldeffectingfactorsofconcretecreep，bendingstrengthandshearstrengthareconsideredonthes

5、eexperimentsAccordingtotheresultofcreepexperiment，variationruleinconcreteshrinkageandcreepfollowedthechangeofaircontentandloadtimeisproposed，verifytheformulaofelasticitymodulusofairentrainedconcrete；Accordingtotheresulto

6、fbendingstrengthexperiment，thelimitreinforcementratioofaircontentisproposedbycomparingwithnormalconcrete，andaircontentisprovedofaccording謝mplansectionpresupposition；byanalyzingslantingsection，shearstrengthtookonhOopreinf

7、orcement，shearstrengthtookonconcrete，verifytheformulaofhorizontaiprojectioninslantingsectionofaircontentstructure，shearstrengthtookonhoopreinforcement，shearstrengthtookonconcreteareproposedKeywordsairentrainedconcreteexp