活性粉末混凝土與普通砼組合箱梁研究.pdf

1、北京交通大學(xué)碩士學(xué)位論文活性粉末混凝土與普通砼組合箱梁研究姓名：肖國梁申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：高日呂曉寅20040301Abstractfhereactivepowderconcrete(RPC)isarevolutionarymaterialthatprovidesauniquecombinationofductilitystrengthanddurability.Itpossessesmanygoodpropert

2、iessuchaslowpermeabilitylimitedshrinkageincreasedcorrosionresistancelightweightandhighstrength.InthispaperanewtypeofrailwaybridgestructureprestressedRPCboxgirderispresented.Therearesomequestionsthathavetoberesolvedbefore

3、thecompositeboxgirderisputintopracticewhichwillbeclarifiedinthreepartsinthepaper.Inthefirstpartusingthefiniteelementanalysismethodthepropertiesofthecompositeboxgirderareanalysissuchasstaticbehaviorfailurefrequencyandsoon

4、.TheprogramofdynamicresponsewhilethetrainisgoingthroughthebeamiscarriedoutinvirtueofADPLlanguage.Accordingtotheanalysisthereasonablesectioncrossandlongitudinalreinforcementaredesigned.InthesecondparthowtokeepRPCandconven

5、tionalconcreteendureloadtogetherisanalysisandclarified.Invirtueofthemethodofsteelconcretecompositebeamstwomethodsareprovidedoneisplasteringglutinousbondbetweeninterfacesanotheristosetshearconnectors.Thenshearconnectorsar

6、esetinthetwolineprestressedconventionalconcreteboxgirderwithspanof32m.Inthethirdpartinfluenceontheconventionalconcreteshrinkageandcreepistakenintoaccount.Equivalentfallentemperaturemethodismadetosimulateconventionalconcr

7、eteshrinkageandcreep.Thensomeeffectiveresolveisprovided.Theaboveanalysisresultsshowthatthenewboxgirderisofgoodpropertieseconomicpracticabilityandwidestdevelopmentalforegroundcomparingwithtraditionalboxgirderwhichisshowna

8、sbelow.(1)Thecompositeboxgirderincreasesthestructuraldurabilityandreducesthemaintenancefee(2)Thecompositeboxgirderdecreasestheamountofreinforcementwhichmakefabricationconvenient(3)Thecompositeboxgirderhaseconomicpractica