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1、XXXXXXXXX學(xué)院學(xué)士學(xué)位畢業(yè)設(shè)計(jì)（論文）英語(yǔ)翻譯課題名稱英語(yǔ)翻譯學(xué)號(hào)學(xué)生專業(yè)、年級(jí)所在院系指導(dǎo)教師選題時(shí)間12FundamentalAssumptionsforReinforcedConcreteBehaviorThechieftaskofthestructuralengineeristhedesignofstructures.Designisthedeterminationofthegeneralshapeandallspecificdimensionsofaparticularstructuresothati
2、twillperformthefunctionforwhichitiscreatedandwillsafelywithstandtheinfluencesthatwillactonitthroughoutusefullife.Theseinfluencesareprimarilytheloadsandotherforcestowhichitwillbesubjected,aswellasotherdetrimentalagents,suchastemperaturefluctuations,foundationsett
3、lements,andcorrosiveinfluences,Structuralmechanicsisoneofthemaintoolsinthisprocessofdesign.Ashereunderstood,itisthebodyofscientificknowledgethatpermitsonetopredictwithagooddegreeofcertainlyhowastructureofgiveshapeanddimensionswillbehavewhenacteduponbyknownforces
4、orothermechanicalinfluences.Thechiefitemsofbehaviorthatareofpracticalinterestare(1)thestrengthofthestructure,i.e.,thatmagnitudeofloadsofagivedistributionwhichwillcausethestructuretofail,and(2)thedeformations,suchasdeflectionsandextentofcracking,thatthestructurew
5、illundergowhenloadedunderservicecondition.Thefundamentalpropositionsonwhichthemechanicsofreinforcedconcreteisbasedareasfollows:1.Theinternalforces,suchasbendingmoments,shearforces,andnormalandshearstresses,atanysectionofamemberareinequilibriumwiththeeffectofthee
6、xternalloadsatthatsection.Thispropositionisnotanassumptionbutafact,becauseanybodyoranyportionthereofcanbeatrestonlyifallforcesactingonitareinequilibrium.2.Thestraininanembeddedreinforcingbaristhesameasthatofthesurroundingconcrete.Expresseddifferently,itisassumed
7、thatperfectbondingexistsbetweenconcreteandsteelattheinterface,sothatnoslipcanoccurbetweenthetwomaterials.Hence,astheonedeforms,somusttheother.Withmoderndeformedbars,ahighdegreeofmechanicalinterlockingisprovidedinadditiontothenaturalsurfaceadhesion,sothisassumpti
8、onisveryclosetocorrect.3.Crosssectionsthatwereplanepriortoloadingcontinuetobeplaninthememberunderload.Accuratemeasurementshaveshownthatwhenareinforcedconcretememberis
