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1、XXXXXXXXX學院學士學位畢業(yè)設計（論文）英語翻譯課題名稱英語翻譯學號學生專業(yè)、年級所在院系指導教師選題時間12FundamentalAssumptionsforReinforcedConcreteBehaviorThechieftaskofthestructuralengineeristhedesignofstructures.Designisthedeterminationofthegeneralshapeandallspecificdimensionsofaparticularstructuresothatitwillperformthefunctionforwhic
2、hitiscreatedandwillsafelywithstandtheinfluencesthatwillactonitthroughoutusefullife.Theseinfluencesareprimarilytheloadsandotherforcestowhichitwillbesubjected,aswellasotherdetrimentalagents,suchastemperaturefluctuations,foundationsettlements,andcorrosiveinfluences,Structuralmechanicsisoneofthe
3、maintoolsinthisprocessofdesign.Ashereunderstood,itisthebodyofscientificknowledgethatpermitsonetopredictwithagooddegreeofcertainlyhowastructureofgiveshapeanddimensionswillbehavewhenacteduponbyknownforcesorothermechanicalinfluences.Thechiefitemsofbehaviorthatareofpracticalinterestare(1)thestre
4、ngthofthestructure,i.e.,thatmagnitudeofloadsofagivedistributionwhichwillcausethestructuretofail,and(2)thedeformations,suchasdeflectionsandextentofcracking,thatthestructurewillundergowhenloadedunderservicecondition.Thefundamentalpropositionsonwhichthemechanicsofreinforcedconcreteisbasedareasf
5、ollows:1.Theinternalforces,suchasbendingmoments,shearforces,andnormalandshearstresses,atanysectionofamemberareinequilibriumwiththeeffectoftheexternalloadsatthatsection.Thispropositionisnotanassumptionbutafact,becauseanybodyoranyportionthereofcanbeatrestonlyifallforcesactingonitareinequilibri
6、um.2.Thestraininanembeddedreinforcingbaristhesameasthatofthesurroundingconcrete.Expresseddifferently,itisassumedthatperfectbondingexistsbetweenconcreteandsteelattheinterface,sothatnoslipcanoccurbetweenthetwomaterials.Hence,astheonedeforms,somusttheother.Withmoderndeformedbars,ahighdegreeofme
7、chanicalinterlockingisprovidedinadditiontothenaturalsurfaceadhesion,sothisassumptionisveryclosetocorrect.3.Crosssectionsthatwereplanepriortoloadingcontinuetobeplaninthememberunderload.Accuratemeasurementshaveshownthatwhenareinforcedconcretememberis
