鋼纖維混凝土的韌性特征在隧道支護(hù)結(jié)構(gòu)設(shè)計(jì)中的應(yīng)用.pdf

1、西南交通大學(xué)碩士學(xué)位論文鋼纖維混凝土的韌性特征在隧道支護(hù)結(jié)構(gòu)設(shè)計(jì)中的應(yīng)用姓名：劉紅燕申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：李志業(yè)20030301西精交通大學(xué)磷士研究生學(xué)披論文妻斯蠢AbstractAsanewkindofcompoundmaterial，SteeIFiberReinforeedConcrete(SFRC)isnowwidelyusedincivilengineeringforitssuperiorductili

2、tyandimpulsionresistance。Diffcrcntfromnormalconcrete，SFRCshowsgreatcapacityofdissipatingenergyinitscrackingstagebecauseofthepullouteffectofsteeIfibersItiSofgreatimportanccforthedesignofSFRcstructurestostudyintensivelyont

3、hisenergydissipatingpropertyofthematerialTheuseofshotcreteasearlyliningsoftunnelisaprevalenttechniqueinundergroundengineeringtodayIncaseswi氌reliablerocksituatiOilshoteretcliningscallevenbeusedaspermanentpropfortunnelTheS

4、FRCcanactasasubstitutefornormalconcreteandyieldsgoodresultsinsuchsituation11le3aperdealsmainlyabouttheapplicationofSFRCinpermanentshotcreteliningsntunnelconstructionThestudyliesinfollowingaspects：1)Agreatnumberofexperime

5、ntsOilSFRCarecarriedOUttoobtainthebasicdataofSFRCenergyproperties，whicharethefundamentalpartsoffurtherj船母2)AprobabilityanalysisbasedonstatisticaltheoryiSdonetoalltheexperimentdata，Intheend，energycriterionforSFRCassociate

6、dwithsecuritycriterionareealculatedandlistedforfutureUSe3)戳壤rationalsupposition，theenergydissipatingmechanicsinSFRC—cracksisstudiedintensivelyAndtherelationbetweentheamountofenergydissipatedincrackingandtheformofcracksis

7、proposedSOthattheenergydataobtainedinthestandardtestscouldbeusedindesignoflinings4A3demensionalfiniteelementmodelisconstructedtosimulatetheexcavationofthetunnelThe曲angcofenergyjnwalirockistrackedjnthewholeprocessandtheam

8、onntofenergytransferredtoliningsisalsoevaluated‘5)BasedontheprincipalofenergyinvarianceandtheenergypropertiesofSFRC，apracticaldesignequationthatrelatedthethicknessofprojectingSFRCtotheenergyrelatedpropertiesoftunnellsgiv