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1、英文翻譯分 院 理工學(xué)院 專業(yè)土木工程 屆別2016屆2012級(jí)學(xué)號(hào)124173755姓名XXX指導(dǎo)教師嚴(yán)蔚老師2015年12月02日<文獻(xiàn)翻譯一：原文>StrengthofConcreteinSlabs,InvestigatesalongDirectionofConcretingABSTRACTIntheoryofconcreteitisassumedthatconcretecompositesareisotropiconamacroscale.Forexample,itisassumedthatafloorslab’sorabeam’sstrengthisidenti
2、calinalldirectionsanditsnonhomogeneityisrandom.Henceneithercalculationsoftheload-bearingcapacityofstructuralcomponentsnorthetechniquesofinvestigatingconcreteinstructureinsitutakeintoaccounttoasufficientdegreethefactthattheassumptionaboutconcreteisotropyisoverlyoptimistic.Thepresentresearch
3、showsthatvariationinconcretestrengthalongthedirectionofconcretinghasnotonlyaqualitativeeffect(asiscommonlybelieved),butalsoasignificantquantitativeeffect.Thisindicatesthatconcreteisacompositewhichhasnotbeenfullyunderstoodyet.Thepaperpresentsevaluationsofordinaryconcrete(OC)homogeneityalong
4、componentthicknessalongthedirectionofconcreting.Theultrasonicmethodandmodifiedexponentialheadswithapointcontactwithconcretewereusedintheinvestigations[1-3].Keywords:Concrete;CompressiveStrengthofConcrete;Non-Destructive1.IntroductionInabuildingstructuretherearecomponentswhichareexpectedtoh
5、avespecialpropertiesbutnotnecessarilyinthewholecrosssection.Componentsunderbending,suchasbeamsandfloorslabsaregenerallycompressedintheirupperzoneandtheconcrete’scompressivestrengthisvitalmainlyinthiszone.Thecomponentsareusuallymouldedinthesamepositioninwhichtheylaterremaininservice,i.e.wit
6、htheirupperzoneundercompression.Concreteintheupperzoneisexpectedtobeslightlyweakerthaninthelowerzone,butitisunclearhowmuchweaker[4,5].Alsoflooringslabsinproductionhallsaremostexposedtoabrasionandimpactloadsintheirupperzonewhichisnottheirstrongestpart.Itisknownfrompracticethatindustrialfloo
7、rsbelongtothemostoftendamagedbuildingcomponents.Whenreinforcedconcretebeamsorfloorslabsaretobetestedtheycanbeaccessedonlyfromtheirundersidesandsoonlythebottompartsaretestedandonthisbasisconclusionsaredrawnaboutthestrengthoftheconcreteinthewholecrosssection,inc
