土木建筑毕业设计外文翻译--混凝土受持续高温影响的强度的研究

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1、外文资料STUDIESONIMPACTSTRENGTHOFCONCRETESUBJECTEDTOSUSTAINEDELEVATEDTEMPERATURESureshNARAYANConcretehasaremarkablefireresistingproperties.Damageinconcreteduetofiredependsonagreatextentontheintensityanddurationoffire.Spallingcrackingduringheatingarecommonconcretebehaviourobserve

2、dintheinvestigationofthefireaffectedstructures.Plentyofliteratureisavailableonthestudiesofconcretebasedontimetemperaturecures.Inpower,oilsectorsandnuclearreactorsconcreteisexposedtohightemperatureforconsiderableperiodoftime.Theseeffectscanbereckonedasexposuretosustainedeleva

3、tedtemperature.Thesustainedelevatedtemperaturemaybevaryingfromafewhourstoanumberofyearsdependinguponpracticalconditionofexposures.Theknowledgeonpropertiesundersuchconditionsisalsoofprimeimportanceapartfromthestructuressubjectedtohighintensityfire.Impactstudiesofstructuresubj

4、ectedtosustainedelevatedtemperaturebecomesmoreimportantasitinvolvessensitivestructureswhichismorepronetoattacksandaccidents.Inthispaperimpactstudiesonconcretesubjectedtosustainedelevatedtemperaturehasbeendiscussed.Experimentshavebeenconductedon180specimensalongwith180compani

5、oncubespecimens.Thetemperaturesof100°C,200°Cand300°Cforadurationofexposureof2hours4hoursand6hourshasbeenconsideredintheexperiments.Theresultsarelogicallyanalyzedandconcluded.1.INTRODUCTIONTheremarkablepropertyofconcretetoresistthefirereducesthedamageinaconcretestructurewhene

6、verthereisanaccidentalfire.Inmostofthecasestheconcreteremainsintactwithminordamagesonly.Thereasonbeinglowthermalconductivityofconcreteathighertemperaturesandhencelimitingthedepthofpenetrationoffiredamage.Butwhentheconcreteissubjectedtohightemperatureforlongdurationthedeterio

7、rationofconcretetakesplace.Henceitisessentialtounderstandthestrengthanddeformationcharacteristicsofconcretesubjectedtotemperatureforlongduration.InthispaperanattempthasbeenmadetostudythevariationinImpactStrengthofconcretewhensubjectedtoatemperaturerange100oC,200oCand300oCsus

8、tainedforaperiodof2hrs,4hrsand6hrs.10Thereviewoftheliteratureshowsthataloto