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1、XXXXXXXXX学院学士学位毕业设计(论文)英语翻译课题名称英语翻译学号学生专业、年级所在院系指导教师选题时间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