大工10春《钢筋混凝土结构》在线作业

/大工1０春《钢筋混凝土结构》在线作业Ｗｏrk10sprｉng＂reinforcedconcreｔestｒｕcture＂oｎlｉｎehoｍeｗork1Totａlscore：10０teｓttｉme：-tｅstsｃｏreｓ：１00＊radｉoqｕesｔionｓ*mｕltiｐｌe—ｃhoiceｑuestioｎs*jｕdgmenｔｑuestionｓＲadｉoexaminａｔionqｕｅstiｏns（15quｅstｉonｓ,６０pointｓ）Scｏre:6０1.，thesｔruｃｔureｏfpresｔresｓedｓteelｂaｒiscalled（）.Ａ．plaｉnｃoncretestruｃtｕreＢ.ｐrｅstreｓｓedconcretｅstruｃtuｒeＣ。cｏncreｔe-fillｅdsteeｌｔuｂesｔruｃｔｕreD。ｓtｅelreiｎforcｅｄconｃretestrｕctureThecorreｃｔaｎsweｒ:BFｕｌlScore:4ｐoｉnｔs:４２．tｈestructureisdesｉgnｅdａccordingｔｏｔheｎｏrmaｌwｏrkingcondｉtｉoｎ.Whichoｆｔhｅfollｏｗｉngiｓnｏttｈemaｉnｃheｃkingitem？。A.coｍponenｔdeｆoｒｍatiｏnB．ｃrａcｋｒesisｔａnceC。cｒacｋｗidthD．ulｔimａtebearingcapaｃｉtyThecorrectanｓwer：ＤＦulｌScore：４ｐointｓ:4３.theaｐplicabｉlityofｔhefｏrmuｌaｆｏrcａｌcｕlatiｎgｔｈeｎoｒmalsecｔｉｏnbeａｒｉngcapａcｉtyofflexurａｌmembｅrswithrecｔangularmemｂers（1）thｅreiｎforcｅmeｎｔraｔiooｆｔheｓectｉonｉｓlｅssｔｈaｎthelimitoｆtｈｅreiｎfｏrcｅmeｎtratiｏ,soａstｏpｒeventthemembers．Ａ.ｌitｔleｔｅndoｎfailureＢ。excessｉvereiｎforｃemｅｎtfailｕｒeC.crａckistooｗiｄeＴheｄefleｃｔionofD.compoｎeｎｔistｏoｌargeThecoｒrｅctaｎsｗer：BFuｌlScore:4pｏints:４４。，therｅlationbeｔｗｅenｔhｅproｂabiｌiｔyofreｌiabｉlityandｔheprobabilityofｆaｉlureiscorrｅct。A。thｅｓumofｔwois１B．ｔheｄｉfferenｃebetwｅenｔｗois1C。theｐｒoｄuctofthetwois1Ｄ。thｅqｕｏｔｉｅntoftheｔwｏis1Thｅcorrｅctａnｓwer:ＡFullScｏre：４ｐoinｔｓ：45.whentheｈｅightofthebｅamisgreａｔｅｒthａnoｒeｑualtｏ３00mｍ，thediａmeterofthｅloｎgｉtudinalｆｏrceｓｔeelbaｒinthebｅａmｓｈalｌｎotbelessthan().A.8mmB．10mmC．12ｍｍＤ。１4ｍmTｈecorｒectanswer：BFullScｏｒe：4points：46。strｕctｕｒｅwithｉｎaspeｃifiedｔｉｍe,underｔhｅprescrｉbedcｏnditionｓ,thｅabiliｔytocompｌeｔetheｉｎteｎdedfunctiｏn，knownasthestｒｕcture。Ａ.securityB．ｄｕrabilityC．rｅｌiａｂilityＤ。applｉｃａｂｉliｔｙThｅcｏrreｃtanｓwer:CＦuｌlSｃore:４pｏiｎts:４7。thｅfolｌｏwingvaluesaboutthemiｎiｍumthicknｅsｓoｆcａsｔ-in－ｐlaceone—waｙslａbsarecｏrrect.A。60mmＢ。70mmC。80mｍD.９0mmＴｈｅcoｒrｅctａｎｓwer：AFullＳcore：4pointｓ:48。ｔheｆｏlloｗinｇvaｌuesfｏrthestreｎgｔhｇｒaｄeｏｆｃｏｎcｒeteaｒecorreｃt．WｈenA．adｏptsHＲＢ335gradｅsteｅlbar，thｅｓtrengthgraｄeofcｏｎcreｔeｓhouldnｏtｂeｌowertｈａnＣ25B．cｏmpoｎｅntssubｊeｃtedｔorepeateｄloａdｓsｈａllnoｔｂeleｓsthａnC20ofthｅconcreｔeｓｔｒengtｈThｅstｒｅngthgradeofC．prｅstressedcoｎcrｅｔestructｕｒeshallnoｔｂelessthａnC20WheｎusinｇD.ｓtranｄasｐrestreｓsedｓtｅelreiｎforcement,tｈｅｓtrｅｎgｔhgradeoｆconcretｅｓｈａｌlnotbｅloｗｅrthanC30Thecorｒeｃtａnsweｒ:ＢFullScoｒe:4points:４9。intｈｅcalｃulationofｔhｅsｅrviｃｅabilityｌimitstａtｅ，ｔheloadisadｏptｅd．A.deｓｉgｎvalueB。rｅpreｓentativevaｌueC．maｘiｍｕmD.meａnＴｈecorrｅctanｓwｅr:BFulｌScoｒｅ：4points：410．iｎthｅfolｌoｗｉngｃircuｍstａncｅｓ,ｔhesｔateｏｆnoｒｍaluseislｉmiｔeｄ.ＴhecraｃkwidthofA.ｒeaｃｈesthestandａｒｄlｉmitTheB.ｍｅmｂercｏncreteｉｓcrｕsｈedＡｌｌthereｉnforｃingbａrsoftheC.ｍｅmberyieldTheｔｅnsiｌeｓtresｓofconｃrｅtｅiｎＤ。presｔressｅdcompｏnentexcｅedsthestandardｌimitThecorreｃｔａnｓweｒ:AFuｌlScｏrｅ：4poinｔs：４1１．thebａsicaｓｓumptionｏfｔhｅcalcuｌatiｏnofｔｈｅnｏrmalsｅｃtｉonbearｉnｇｃapａcityofthｅconcreteｍeｍｂerｓbelｏwｉs(。ＳtｒaｉｎmaintaiｎingplaneofA．ｃrosssectionB.takeｓiｎtoaccounttｈetensilｅstｒeｎｇｔhofconｃrｅteThｅｓtress-strainｒeｌatioｎcuｒveｏfＣ.concreteｉsaｄoptedaccordingtotherｅgulationThｅstress—straｉnrｅlationeｑuaｔionoｆD．lonｇitudinalsｔeｅｌbarisaｄｏptedａccordｉngｔoreｇulaｔｉonｓＴhｅcoｒrectanswｅr：BFｕllSｃoｒe:4pointｓ：41２．Ｔsｈapedribbeｄｂeamsoｆfｌangeｗｉdthｃalcuｌatioｎacｃordingtothecａlculaｔioｎforcoｎsiderａtｉoｎ（ｓｐａn)。A.calcｕlatｅs1／3oｆthespaｎＢ.ＬｉaｎgKuanaｎｄtheｓumofthebeamsanｄribsC。cａlculates1／６ofthewｉdtｈD。ＬianｇKuanaｎｄbｅamrｉｂnｅｔdistａncｅof1/2ａｎdＴhecorrectansｗer:ＡFullScore：４pｏints:413.rectangｕlａｒbｅaｍsectｉonsｉzｅis２50mm＊5０0mm,thecrosssｅｃｔioｎeffectiveheｉｇhｔｉs465ｍｍ,thｅｂenｄinｇmomentis1８0kN．M,theｃonｃretｅｃompｒｅssivestreｎgtｈstandardvalueis１4.3N/mm2，tｈeseｃtｉoncompｒesｓionareaequivaｌentstressｃｏｅfficieｎttakes１,Thesection＇ｓresiｓtaｎcecoeｆｆicｉentis（).A．３。33B.4。76C。0．233D。0．43３Thecoｒｒeｃtanswer:CFullＳｃorｅ:４points：４14．tｈeconcretｅstreｎgthｇｒadestiｐulatediｎthecodeofcoｎcretestｒuｃｔureｉｓstandarｄ,ａndｔhesampleａdoptssｔａnｄaｒdｔｅstmetｈoｄ,andhａｓcubiｃcoｍpressiveｓtrength.Ａ．８０％B．85％Ｃ。90％Ｄ.95%Thecorrectanswｅr:DＦｕllScoｒe：４poｉnts：４15。ｔｈeuｎifｉeｄｓｔandａrdfoｒstructuralreliａbｉlitydesignｏfｂｕildingsｃoｎsideｒｓthereductioｎofｔｈeｖａriaｂleloadｓｔａｎdaｒｄvａｌuetomuｌtｉplｙｉtbｙaｆａｃtoｒ．A.grｅａterthan1B.lｅssthan１C。eｑualｓ1D．oｒmoreiｓwrｏngThecｏrrectanｓwer:ＢＦullＳcorｅ:4points：４OｎeSeeｐｉｃturesforqｕｅsｔｉｏnsＡ.B．C．Ｄ.Tｈeｃｏrreｃｔansweｒ：ＡBFulｌScoｒe：４ｐoｉntｓ:4２．tｈefolloｗｉｎｇfａctoｒｓtｈaｔaffｅctconcｒeteshriｎkagｅarｅcoｒrｅct.ThegrｅａterｔhｅwａterｃｅmentｒａtｉoｏfA。，tｈeｇreaterｔhｅshｒinkagｅＴhelarｇｅrthｅelａsｔicｍodｕlｕｓoｆＢ.ａgｇregatｅis,thesｍａｌlertheshrｉｎkａgeisC。tｈedenｓｅrtheｃoncｒete，thｅgrｅatertheshrinｋagｅThｅgreaterthｅｈumidiｔｙ,thｅｇreａtertheｓhrｉnkagｅｄuringD.bondinｇTｈecｏｒrｅcｔanｓwer：AＢＦuｌｌScｏre:4points:43.whatareｔhｅbasｉcvaｌuesofｔhefolｌoｗiｎgｖaｒiableｌoads，whiｃｈarenｏtthｅirbasicreｐrｅsentatｉvevalues？。A.standaｒdｖａlueB.ｃomｂiｎatioｎvalueC.quasiｐermａnｅntvaluｅD.freｑueｎcyencoｕｎtｅrThecoｒｒeｃtａnsｗer：BCDＦullＳcore:4points:４４。whｅnthesafetyｌevelｏfｔheｓｔrｕcｔurebeｌoｎgｓtoleｖｅltｗo，tｈecombｉｎａtionｏｆiｔstarｇetreｌｉabｉliｔyindexandｆａilｕreｔypeｉscｏrrｅctasfoｌlｏｗｓＡ.３。2,briｔtlefaiｌurｅB。３.２ductiｌeｆaiｌｕrｅＣ。３.7，brittlｅfａiｌuｒeD.３．7ducｔilｅfailｕｒeThecorrectａnｓwer:ＢＣFuｌlScｏrｅ：４ｐoｉnｔs:4Ｔhenetｓpaｃｉngｉｎthehorizonｔaｌdiｒectioｎｏftｈelｏwerloｎgitudiｎａｌreiｎforｃｅmenｔoｆｔhｅ5。bｅamshaｌlnｏtｂeleｓsthan（）。Ａ.25ｍmＢ.DＣ．3０mmD。1.5DThecoｒreｃtansweｒ:ABFuｌlSｃore:4points：4Jｕｄｇmentquesｔions(10ｑuestiｏns,２0ｐoints)Sｃｏre:201．ｔheｃalｃｕｌaｔｉoｎｃｒiｔerionoftｈｅnorｍａlsｅcｔｉonbeariｎgcapａciｔyofｒeｉnfｏrcedcｏncretemembｅrｓgivestｈeｆaiｌurecｒiteｒiｏｎofｒeinforcedbars,tｈatｉs，theultｉｍａtｅstrainis0.01。A。errｏｒB.corrｅｃtThecｏrｒectanｓwｅr:BFullSｃorｅ:2poｉntｓ:22．variableloａdｉsthｅloadthatcaｎnｏtbenｅgleｃtedwhｅnｔｈevalｕeoftｈestｒuctｕrecｈaｎgeｓwiｔhｔｉmeduringthｅperｉodoｆstrｕctｕｒaldesign．A。eｒrorＢ.coｒreｃtThecoｒrectａnswer：ＢFullScoｒe：2ｐｏiｎts：2３.thestｉｒｒupsshｏuldｂemadeofclosedtyｐeｉntherectangularsecｔiｏｎbeamｓwithaspａｎofnomoｒetｈan1５d(Distｈeminｉmｕmｄiametｅｒｏfthecｏmｐresｓionsteeｌbars)。Ａ．errorB。correctＴhecorrｅctanswer：BFuｌlＳcore：２points:2Theｐｒoｖisionsｏftｈｅ4。”buｉlｄingstｒｕcture"ｌoadcodeｆorthedesign，thebasｉccombinationofloadeｆｆectｃombinaｔionｖａlueoｆtwｏkｉnｄsofcoｍbinaｔionｃontｒolfromｔheｖaｒiａｂleｌoadeffectaｎdcontrolｌedbｙthｅperｍａnentｌoａdeffectinthｅmｏsｔunｆaｖｏｒablevａｌｕe。A.errorB.coｒrectThecｏrreｃtａnswer：BFullＳcｏre：2points:2５。ｃreｅｐcancauseｐrestreｓslossinprｅstrｅssｅｄｃoncreｔｅsｔructure.A.errorＢ．ｃorrectThecorrectanｓｗeｒ:ＢFullScore：2points：26。comｐａredwithｔhereinｆorｃedｂｅam,tｈedｅstrucｔionoftｈｅｓｕperreinforcedbeambegiｎswｉthｔhetｅnｓｉlestｅelbａr.A。erroｒB.cｏrrectThｅcｏrｒectaｎｓwer：AFulｌScore:２ｐoinｔs:2７.ｃarbonstｅｅlcontaininｇlessthａn0.25％carboniscalｌeｄlｏｗcarbｏnsteeｌ．A．errorＢ。correctTｈeｃｏrｒectaｎｓｗｅr:ＢＦullScorｅ：2poinｔｓ：28.ｔhｅreｌｉabilityofthestｒuｃtｕrerefｅrｓtoｔhepｒobabilitythatthestrｕｃtureｃanｎotcompletetheschｅduｌeｄfunctionuｎdｅrnｏrmaｌcoｎdｉｔionsｄurｉngｔhedｅｓｉgnlｉfｅ。Ａ．eｒｒorB.correcｔThｅcorrectanｓｗｅr：AFulｌScore:2ｐoints：2９．doubｌeｒｉbｓeｃtioｎisａｐplicablｅｔothecondｉｔｉonthatthebeａｍcrossｓectionisｓｕbjｅcｔｅdtodifferｅntnumbeｒsｏfbｅｎｄingmoｍｅntundｅｒdｉｆferenｔloadｃｏmbinatｉｏｎｓ.Ａ.erｒorB。coｒreｃｔTｈecorｒectaｎswer:ＢＦｕｌlSｃｏｒe:2points:21０.paｒtｉalcｏｅfficientｓofapｅrmａnｅntload，Aｃcoｒｄinｇtoitｓefｆｅｃt，tｈedisadvantageｓandaｄｖａntaｇesofｔhesｔrucｔｕreaｒereｓpectively1。2(1．35)and１,ａndthｅpartiａlfaｃtoｒｏfｖaｒiａbleｌｏaｄisgeｎｅrally１。４。A．errorＢ。correctＴhecorrecｔanｓｗeｒ：BFulｌSｃore:2pｏiｎtｓ:2Work10ｓpring”ｒeiｎfoｒcedconcretestructurｅ＂ｏnlｉnehｏmeｗorｋ2Toｔaｌscorｅ：100ｔesｔtｉme：—ｔeｓｔscｏrｅｓ:10０*ｒａｄioquｅstｉｏns＊multiplｅ－choicｅquestiｏnｓ＊judｇmenｔquestｉonsRadiｏexaｍinationquｅstionｓ(15quesｔioｎs,60poiｎts)Scoｒe：601．forsｅcｔiｏnｓizeｂ＊hthesamerｅctanｇle,TshapeandinveｒteｄTｓｅctionbeａm，wｈｅntheａctｉｏnhａscｏncentrａｔｅdｌoａｄ，itｓｓhｅarｂｅarｉngｃaｐａciｔｙ．A。equalｉtyB.，Tｓhape,croｓsｓecｔion，bｉgｂeａｍC．rectanguｌarcｒoｓssectionbeａmD。inverteｄTｓhaｐecroｓssectionbeambigTｈecorrectanswer：ＢFullScore：4points:４２.ｏｆthefouｒfaｉluｒemｏdｅsｏｆatorsiｏnmｅmbｅr,ｔhｅductilｅfａilurｅis(）.A.damagedtendonsB。ｐaｒｔｉalreinfｏrｃementfaiｌuｒeC.excｅssiｖereｉnforｃeｍｅntｆailｕreD.litｔｌetendoｎfａｉluｒeＴhecorrecｔansweｒ：ＡFullScoｒe：４ｐoints：43。theｓpａcinｇｂｅtweeｎstirｒupsoｆｂentmembｅrsistoosmalｌ.A.ｏｃcursbyｏbliquetensileｆailuｒeSｈearfaｉlureｏccｕrrediｎB。Ｃ.occuｒｓbybarｏcliｎｉcfaｉlｕreD.wilｌａffeｃｔtｈequａlｉtyofconstructionTｈecorｒｅcｔanｓｗer：DFullScoｒe:4ｐoints：44.，ｆorｔhethreｅkinｄsofoｂliqueｓheaｒfａiｌureｆｏrmsofbeams,ｉtisnecesｓarytｏcａlcuｌatetheshｅaｒbｅariｎgcａｐacityofaｃｏmpoｎenｔｔoｓａｔisfyaｃｅrｔaindiagonalsectｉoｎ.Ａ．bａrｏcliniｃfaiｌureB.ｓｈeａrcompreｓsionfaiｌurｅC．ｏblｉｑuｅtensilefaｉlｕｒeＤ.isnotｃoｒrectａtallThecorrectaｎswer：BFulｌScore：４poｉnts:４５.theｌargerthｅsｌｅｎdｅｒneｓｓratiooｆtheｌｏngercolumnｓ，ｔhebetterthｅｂearｉｎgcapaciｔy.A．ｒedｕcesmaｎyB．bａsiｃallyunchangeｄC。ａddsalotＤ．isnotafｆeｃtedThｅcｏrｒｅctａnｓwer:AＦulｌSｃore：4pｏiｎts：46。whｅncaｌｃｕｌatinｇthｅamouｎｔofｓteｅlreinｆorｃeｍｅntforaｂentcｏlumn，theｄｅsignvａlｕeofshearistakｅnaｓfoｌｌows。A。fｒｏnｔbendrｅinforｃemeｎt，comｐrｅssionzｏne，bendinｇpoint,ｔｈecorｒespｏnｄｉngshｅaｒvalueTheshｅａｒvaｌueａttheedｇｅoftheB.sｕppoｒtC．fronｔｂendｒeinforｃemenｔ，ｔenｓileａrea,ｂeｎdｉｎgpoiｎt，theｃｏrresｐondingshearvalueD。thebentｂarｉstheｓheａrfｏrceaｔthebeginningoftｈｅtｅnｓioｎzonｅThecorrectaｎｓｗer:CFulｌScore：4ｐoiｎts：４Ｔheｃaｌculａｔioｎleｎｇthoｆｔｈe７．ｍemｂeriｓrelａtｅｄtothesuppｏrtaｔbothｅｎdsofthｅｃomponeｎt，anｄwheｎthetwoｅndsarｅｆｉxed，ｔheｃａlｃulatedｌeｎｇthis(）。A.Ｌ(tｈeａｃtualｌeｎgthｏfthecｏmpｏneｎt)B．0。5LＣ.0。７ＬD。２LTheｃｏｒrectａnsweｒ：BFｕｌlScorｅ：4pointｓ:48．thefollowｉngbasｉcassumptionsａboｕｔｔｈevarｉableanglespａｃetｒussmoｄelａreinｃｏrrecｔ。Ａ.concreｔｅonlyｗorkｓunｄerpreｓsureB．stiｒｒupsbeaｒtenｓionｏnlｙC。ｌｏngiｔｕdｉnalbaｒsｂｅarboｔhteｎsｉonandpressuｒｅD。igｎoresthetｏｒsiｏnalactionofｃorecｏncretｅＴhecorrｅｃtaｎsweｒ：CFuｌlSｃｏｒｅ:4pointｓ:4９.theminiｍuｍfaｉlｕreｆormofshearstrenｇthoｆoｂｌiｑuesｅcｔionbeamswithouｔｓｔirrｕpsiｓ（）。A.bａrocliniｃfailuｒeB.ｓhearcompｒessionｆaiｌureC.obliquetensｉｌefailureD．isnotcｏrrectatallThecorrectanｓwｅr:CFulｌＳcoｒe：4poiｎts：410。,whenthelｏngitudiｎalｒeiｎforｃｅmeｎtratiｏofcompresｓｉonmembeｒexceeｄs３%，ｔheｓtirrｕpｄiameｔershｏuldnotｂeｌesｓthan(）.Ａ．5mmＢ.６mmC.7mmD.８ｍmThecorrecｔａnsｗer：DFulｌSｃoｒe:4poinｔs:４Ｔｈeratioｏｆreinfｏrcemｅnｔofａlｌlｏngｉtｕdinalｂaｒssｈoｕｌｄnoｔbeｌessthanthaｔoｆ１1。aｘiaｌcomｐressioｎmembｅrsａndeccｅnｔriccompressｉonmembｅｒs。A．0.4％B。０.5%C．０．6%D.0．7％Ｔｈecoｒrectansｗeｒ:CＦullSｃore：4pｏｉnｔｓ：412.,ｆortheｃoｍｐｌeｘsｅctiｏnoｆtheｃomｐonent，ｎotｔouｓｅ()stirrｕpｓ，tｏaｖoidｔheoutwardｐullinｇｆorce,ｒｅsｕｌtｉnginthecornｅrofｔｈeconcretｅdamaｇed。A。hasaｎouteｒｆｏldaｎgleB。hａsanｉntｅrnalfoldangleC．sｉngｌeｓtiｒrｕpＤ。composｉｔesｔiｒｒuｐTｈｅｃorrectansｗeｒ:BFullSｃore:４ｐoints：４１3.，ｔhｅsectｉｏnisbａｓｉcaｌｌyaｌltenｓion，tｈeｒｅisｎocompressｉoｎｚone,iｎtheviｃｉｎityofdeｓtrｕｃtion,ｔrａnsversｅcｒackscａnｐassthｒoｕｇh,theｆａilureｆoｒmoftheｗｈoｌｅｓeｃｔiｏnbeloｎgsto()。Ａ。lａrgeeccenｔrictensｉonB。ｌargeeccenｔriccoｍpressionC.ｓmａlleccentrｉcteｎｓionD。SｍallecceｎtriｃｃｏmpresｓioｎTheｃｏrｒecｔａｎswer：CFuｌｌScore:４pｏints：４１４.foｒａgivｅncrosssecｔiｏn，ｕnderthecoｎｄitiｏnoｆsｍaｌｌｅccｅｎｔｒiｃcoｍpresｓｉon，thelｏaｄLiＳuizhidecrｅasesastheaｘiａlforceincrｅａseｓ。Ａ。normaｌsｅcｔioｎbeｎdingB．norｍａlsectionisｓhｅareｄC.oｂliquesectiｏnbeｎdiｎgD.ｏbliquｅseｃｔｉoｎshｅａrＴhecorｒectanswｅｒ:ＡＦuｌlＳcore：4poｉｎts:41５.settｈｅｐurpoｓeｏｆｂendｉｎgtｈebａr,ｔｈefolloｗingstatｅmentisｎoｔｃorｒect.A.ｍeetｓｄiagonalsｈeaｒresiｓtanceＢ。sａtiｓfiesobｌｉquｅｓectionbendiｎｇresｉstancｅThｅC.acｔsａsasupportandthenｅgａtｉｖelonｇｉtuｄiｎalｂarbearsthenegａtivemomentofthesｕpｐortＤ。inｏrdeｒｔosegmeｎtｓｔeel，ｍａkefulluseoｆmｉdｓpａnｌongｉtｕdｉnａlrｅiｎｆorｃemenｔThｅcｏrｒｅｃtａｎswer：ＢFullScｏrｅ:４ｐoints:4(atｏtaｌof5mｕltipｌe—choicequestｉｏns，atotaloｆ２0ｐｏｉnts.）Sｃｏrｅ:２01。abouttｈecharacteristicsofｔｈｅｃoｍpｒeｓsionfaｉｌurｅofthesizeeccｅntriｃity,thefollowiｎｇstaｔｅmeｎtiscorreｃt.A．ｅｖｅntuaｌlydeｓtroystｈesａmefｏrmThｅcａｕsｅsofB．damaｇearedifferentＣ．beｌｏｎgsｔobriｔtｌｅfracｔuｒｅThecａrrｙingcaｐaｃityｏfD．compｏnentｉsthｅsaｍeThｅcorrｅctanswｅｒ：AＢFｕllScorｅ：4pｏints：42．iftｈｅlimitloaｄistｈesamｅｗhｅnthebouｎdaryisbroｋen，thereqｕirｅｄconditiｏnoｆthecrｏsssｅctioniｓ（）。A。hastｈesameｃｒoss—sectionsｈapeB.sectｉoｎｓizｅisｔhｅｓameC.concrｅteｓｔrｅngｔhgｒadｅistｈesameD.gradeofreinforceｍentｉsthesameThecｏrreｃtaｎsweｒ：ＡBCＤFｕｌlScｏre:4points：43。ｔheｍａinｉｎclinedcrackｓintheｒeiｎfｏrcedconcｒeｔebeaｍsintheｓhearbeｎdsｅctionｏfｔhｅjointａcｔionofsｈｅaｒanｄbendingmｏmeｎtａｒe(．A.abdominalsｈeａrobliquefraｃtureB。ｓplitcracｋC.spirａlcracｋｓＤ.benｄinｇｓhearobｌiqueｃraｃｋTheｃｏrrectanｓwer:ADFuｌlＳcore：4pｏints:44。ｔhｅsｕmoflongitｕｄinalｒeinforcｅmentoｆｂenｄinｇandtorsionmemberｉｓ(andsuｍof)。A.flexurallongitｕｄinａlreinfｏrcｅmentB．twisｔedbaｒsＣ．shｅａrlｏｎｇｉtudinalreｉｎforcｅｍeｎｔD。ｌongitudinaltensionbaｒｓThecorrectａnsweｒ：ABFuｌｌScore：4points：４５。ｔhｅfarｔherthｅmateｒialｄiagramｉs，ｔhemoｍentenveｌoｐeｄiａgramofｔｈｅｂｅamiｓ,tｈe。ThｅhigheｒtheuｔｉｌiｚationofＡ.matｅrｉａlisThelｏｗｅｒtheｆｕｌluｔilizationoｆB。mateｒialsiｓTheｇreａterthｅsａfetyreｓerveofthｅC。bｅamＤ.isｍorelｉkelytohａvｅcrosssｅcｔionsｈearresｉstanｃeThecorrectａnｓｗｅｒ：BCFullScｏre：４points:4Jｕdgmｅnｔｑuｅｓｔｉｏｎｓ（atoｔalof10qｕesｔioｎｓ,atoｔalｏf２0ｐoiｎts）Ｓcore：20１。lｏngitudinalcoｍｐressｉoncoluｍｎlｏnｇｉtｕdinalrｅinｆorcemenｔｃａnpreｖenｔaccidentalｅｃceｎtricdamageａｎdimｐｒｏｖethedｕcｔilityofｃompoｎent。A．ｅrroｒＢ．cｏrrecｔThecorreｃｔanｓwer：BFullＳcore：2ｐoinｔｓ:２2.tｈｅｓtｉrrｕpshoｕldｍeetｔｈｅlowｅrｌimitrｅquiｒｅmenｔoftｈｅfｏrmulasoaｓtｏprｅｖｅnttｈｅｃaｂｌe—stａyeｄｆaｉｌure。A.erｒorＢ。cｏrrectTｈeｃｏｒrectanswer：BＦuｌｌScorｅ:２points:２3。bendｉngtheｅｎｄoftｈｅsteｅlbarｔothｅsｉdeｏfthesupportｏrtｏthefrontrow,bendiｎgｔhebａr，tｈediｓtanｃｅbetwｅeｎthesｔaｒtingpｏｉｎｔssｈoulｄnotｂelｅssthantｈeｍａxｉｍｕmspacingoｆthesｔiｒruｐs.A.erｒorB．cｏrrectTheｃｏｒｒecｔａnｓｗｅr:AFullScore:2ｐｏintｓ：24.ｓymｍeｔriｃａlreｉnｆｏrceｄIseｃtioｎｅｃｃentｒｉccompresｓioｎcolｕmnhaｓthesamｅsectionfａｉluresｈapeastheＴｓhａpesectｉon。Ａ.eｒroｒＢ．coｒrectTheｃorrｅctａnswer:AFullScore：2pｏiｎｔs：25。，ｔhｅdiffｅrencebｅtｗeｅｎtheducktendonandthefloatbariswｈeｔherｔｈeanchoｒｅnｄoｆthetｗoanｃｈｏrisｌocaｔｅdintheｃｏmpｒeｓsionzｏne，andthetｗｏanchorendisloｃatedinthecｏｍpreｓsioｎｚｏne，whichiscalledtheducｋtendon。A.erｒorＢ。cｏｒrｅｃtThecorrｅctａnsweｒ：BFuｌlSｃoｒｅ：2pｏｉｎtｓ:26。theinitｉalcrａckｓofreｉnforｃedcｏncｒeｔemeｍbersunderrectangularcroｓsｓectｉonusuaｌlｙｏcｃurnｅaｒｔｈｅｍidｐointofthｅlonｇｓiｄeofthesecｔｉｏn，aｎｄtheyａre45deｇreestｏｔheaxiｓoｆthｅcomponent。A。errorB。correｃtＴhecorreｃtanswｅr:BＦｕllScore：2pｏints：2The7．axistenｓiｏnｍembeｒcanbedivideｄintｏｔｈreestressstaｇeｓfｒｏmloadiｎgtoｆaiｌｕｒe。A。errorＢ.ｃorrｅｃtＴhecorｒeｃｔａｎｓweｒ：ＢFullＳcｏrｅ:2ｐｏintｓ:2Thｅrａtiobｅtween8.ｓhｅａｒspanaandseｃtionｈeiｇｈthisｃallｅdsｈeaｒｓpanｒatｉo.A。errorB.coｒrectTｈecoｒｒectanswer:ＡＦｕllScore:2ｐoints:29．，theteｎsiｌefailureofreｉｎfoｒｃeｄconcｒeｔｅecｃｅntricaｌlｙcomprｅssedshｏrtcoluｍnｓiｓａｌsｏcallｅdlaｒgeeccenｔriｃcomｐressionfailure,ｗhichｂeloｎｇstotｈeｄuctiｌefailｕrｅtｙpｅ.Ａ。erroｒB．coｒｒeｃtTｈecoｒｒectansweｒ:BFullSｃore:2pｏints:210。theｃrossｓectionofｔｈeeccentricaｌlycompressedseｃtｉoｎoｆthｅｒecｔangularsｅctionrｅaｃｈeｓtｈelimit。Ｗｈｅｎthefaｉlureocｃuｒs，tｈｅｃoncreｔereachesｔｈeultimatecｏmpｒesｓiｖestｒaiｎvaｌuｅ,buｔthｅtensiletｅｎdonｄoｅsnoｔneceｓsarilyｒｅachthｅｙｉeldｐｏiｎｔ.A。eｒｒoｒB．cｏrrectThecｏｒrｅctaｎsｗｅr：ＡFullScore：２pｏints:２Ｗork10spｒing”ｒeｉnforceｄcoｎcrｅｔestructuｒe”onlinｅhomework3Ｔoｔalscｏre:100teｓｔｔime：-tｅｓtscｏreｓ：10０*radioqｕｅstions*multｉple—ｃｈoicｅquｅsｔionｓ＊ｊudgmｅntquestionｓRａｄioexａmiｎationquｅstions(１5queｓtioｎｓ，６0poｉnts)Ｓcｏre：601．ｉnthebasiｃrequirementsｏｆsｔｒuｃturａlconｃrｅtedurａｂｉlｉｔy，thｅenvｉronmｅnｔalcaｔegoryisaclass,ａｎdthｅwatｅrcemｅｎｔratioiｓｎｏｔｇｒeaterthan()．A.0。5０B。0.5５C.0。6０D．0.65Thecorrectａｎswｅr：DFｕllＳcore：4points:42.tｅnsｉlｅcｏntrolstrｅsslimiｔ,forhｅattreａtｍentsteeｌｂar,firstＺｈａnｇFazhoｎｇfｏｒ（）ａｎdFfoｒprｅｓtresｓedsteelsｔrengthsｔａndａｒdvａlｕｅ.A.0．65fB。0．７0fC。０.７5fD．０.8０ｆThecorｒectansweｒ：ＢFｕllＳcore：４ｐoinｔs：４3。ｉnａddiｔiｏｎtothefollｏwing()sｔrucｔure，ｐriorityshaｌｌｂｅgivenｔopreｓtreｓsedｃonｃretestruｃtures.A．rｅｑｕirescｒaｃksｔｏcoｎtｒｏlstｒｕｃturesoｆhｉｇhｅrranｋB.ｌargespanorlaｒgeｆorceｍembｅrC.rｅｑｕirｅsmorｅｓtｒuctuｒalmemｂerstocontrｏlstifｆnｅssanddeforｍａｔiｏnｏfstructｕrｅｓD.ｒeinforceｄｃoncreteflｏoｒｏfanorｄiｎaryhouseTheｃorrectanｓwer:DＦｕllScore:４poｉntｓ:44.thｅtorsionbａrsｉnｔhetoｒsionｍｅmberaｒenoｔcｏｒｒect．TheA.ｓｈaｌlbesymmｅtｒｉcａｌlyarranｇｅdaｌoｎgthｅpeｒiｍｅｔeroftheｓeｃtionasｕｎiｆormlｙaspｏssibｌeB．aｔtｈｅfｏurｃoｒnersofthecroｓssecｔion，yoｕcａnseｔuｐaｎtitwisteｄloｎgiｔｕdｉｎａlbars,oryｏucannｏtsetupantitwiｓteｄbaｒsＣ。mustbeeqｕippedwithtoｒｓionbarｓatｔhefoｕrcornｅrsｏfthecrosssectioｎD.shoｕldnoｔeｘceｅd300mmandsｈouldnoteｘceeｄthｅshoｒｔsecｔｉｏnｓizeofcrｏｓssｅctionＴheｃorｒectansｗer：BFullＳcore:4pｏｉntｓ:4５．，fortheｆａctorｓthａtaffeｃｔconcretecarｂonizａｔion,themｅasuresｔoreduceｃaｒbｏnationareincorrecｔ。A．reasonaｂledesigｎmiｘｒatｉoB．reducesｔhｅcompactｎeｓｓoｆconｃreteC。speciｆiestheminiｍumthicknesｓofpｒoｔecｔivelayerfoｒreｉnｆｏｒｃｅmeｎtD.usescoveraｇelaｙerThecorreｃtaｎｓweｒ:BFullＳcｏrｅ:4points:46。prestreｓｓingfoｒceｏfｓｔeelｂarrelaxationreｆｅrstotｈeforceｏfsteｅlbar。UnｄerｔhｅconditionthatｔheｓｔressｏfA.sｔeｅlｂaｒｓｒｅmaiｎscoｎstaｎt,tｈesｔｒａinwillｇraｄｕaｌlyincｒeasewitｈtiｍeＵｎdeｒtheｃonｄｉtｉoｎtｈatthestreｓsofＢ．steｅlｂarsremａinｓｔhｅsamｅ，theｓｔraｉnwｉllｇrａduallyｄecreａsｅwiththeｉｎcreａｓｅｏftimeUndertheｃonditionthattheｌｅngｔhoｆＣ．sｔeelbarsremａｉnｓcｏnsｔant，thｅｓtressofｓteelbaｒswillｉncrｅａseｇraｄuａlｌｙｗｉｔhtheincｒｅaseoftｉmｅUndeｒthecondｉtiｏnthatｔheｌeｎｇｔｈofD．sｔeeｌbarsremainsconｓtant，ｔheｓtｒessｏfｓteelbarｓwilｌｄｅｃｒeａsegｒadｕaｌlｙｗiththeｉｎcrｅaｓeoftｉmeTｈecorreｃtａnsｗer：DＦｕlｌＳｃore：4ｐｏiｎtｓ：47.”moｓtsｔiffｎeｓsｐrｉnciplｅ"rｅfersｔothesiｍｐliｆiｅdcａlｃｕlaｔioｎｏｆｂeaｍinthespanｒａnge，canｐress()stiffnｅssｃaｌｃｕｌaｔｉonoftheｍaximumbeｎｄinｇｓectioｎ.Ａ．pressureB．torｑueC.sheaｒfｏrｃeD。ｂendiｎgmomentＴhｅｃorrectａｎsｗer：DFullScorｅ：4ｐoints:4８。whenthestrｅngｔhoｆｔhepreorｄｅrisｇreatｅrｔhanｏrｅqualto1，thecoｎｃreteｉs（）。A.pａｒtiaｌlypreｓtｒessedcｏncrｅteB.ｆullpｒeｓtｒessｅdconcｒｅtｅＣ．oｒdinarｙreinforcedconcrｅteD．plａiｎconｃreｔeＴhecorｒeｃtanｓwｅr:BFｕllＳｃoｒe：4pｏiｎts：49.ｔheｆｏlloｗingdｏｅsｎｏｔbｅlｏngtotｈestructｕralcrａckwidthｃheｃktheｒeｌevanｔvaｌuｅiｓ（)．Ａ.ｌoaｄbasiｃvａluｅB。loaｄsｔaｎdarｄvａlueC．loａdquasｉpermaｎeｎｔｖalueＳtandarｄvaluesforsｔrｅngthofD。matｅriaｌｓTｈeｃorrectanswer：AＦｕllＳｃoｒe:4poｉntｓ：4１0。iｎtｈｅbeｎｄinｇｓhｅaｒｔｏrｓioｎmｅmｂer,tｈestructureoftheｓtirrupsｓuｂjｅcｔｅdtｏｓheaｒtorｓｉoｎiｓnotexａct.A.sｔｉrruｐsｍustｂemaｄｅinｔocloｓedtｙｐeB。theｅndofｔｈeｔwｉstｓtirrupsｈallbemａdeｉｎtoａ1３０dｅgreeｂｅntｈookＷhenC．ａｄoptscoｍposiｔestirｒｕｐs,ｔhesｔirrupsinsiｄｅtｈeｓecｔｉonshoulｄbeiｎcludｅdＤ.thｅlengthｏftheｓtｒaighteｎｄofｔhebｅntboｗｓhａllnotbelｅssｔhan1０DThecoｒｒectansｗer:CFulｌScore：4ｐｏｉntｓ:4EleｖenIntｈecａｌcuｌationｏfＴandIsｅctiｏnpuｒetｏｒｓiｏnｍｅmｂeｒs，ｔhｅcrosssectｉonｃaｎbｅdｉｖidedintoｒeｃtanｇles，andｔhｅdｉvisionprinｃｉｐｌeiｓ().A.dividｅstheｔensileｆlangefirstB。fｉrstdｉvidestｈecｏmprｅｓｓionfｌangｅＣ。ｍeetstheintegrｉtyofthewebfirsｔD.ｆｉrstmakesurethｅfｌａｎgｅisintactＴheｃorrecｔanswｅr：CFｕｌｌScｏre:4points:412。tｈｅｆolｌowｉｎgfaｃtｏrsｔhatａfｆeｃｔthｅshort—termｓtiffｎｅssofBsarｅｉｎcｏrｒeｃｔ.ＡｓtｈeA.moｍｅnｔinｃreasｅs,theBsdecｒeａsesａcｃoｒdiｎglyB。rｅｉnfｏrceｍeｎtrａtiｏｉncrｅａsed，ＢｓsiｇnificaｎｔｌyｉncrｅasedＴｈeC.sectioｎhａsatｅnsｉlefｌangｅ，aｎdtheBsincreasesＤ.ｒeｉnforcemｅｎtrａtｉo,materｉaltiming，croｓssectioｎefｆｅctｉｖehｅightincrease，ｔheimｐｒovementofＢsissignｉficanｔTｈｅcorrｅcｔａnswer:BＦuｌlScore:4pointｓ：４１3。thedｅsigｎｏfcｏncrｅｔestructuｒeswithaseｒｖiceliｆeof100ｙearsanｄinagｉvenｅｎvirｏnｍeｎtshalｌｃoｍｐlｙｗiththeproｖiｓionｓofｗhiｃｈtheincorrectｏneｓare（).TheconcreｔeｓtrenｇthgｒａdeoｆA。reinforcedconcretestructuｒｅshａllnotｂeｌoｗerｔhanＣ30ThecｏｎteｎｔofcｈｌｏｒidｅｉoniｎB。conｃreteｓhaｌlｎｏｔexｃeed0.０6%ｏfｔhｅcｅmentcｏｎｔｅntC．shoｕlｄusenｏnaｌkaｌiacｔivatｅｄａgｇregatｅＴheｃoncreteｓtrｅngthgradeofＤ．prestressｅdconcｒetesｔructｕrｅshallnoｔbｅlｅssｔｈａnＣ30Thecｏrreｃtａnswｅr：ＤFulｌScorｅ:4points:4FoｕrｔeeｎSeepictuｒesｆorquｅsｔionsＡ.Ｂ.C。Ｄ。Tｈecorrｅctanｓweｒ：DＦullScorｅ：４pｏinｔs：415。，therequirementfｏranｃhｏraｇeｉnprestresｓeｄcoｎcreteｍembｅrｓisincoｒrect．A。ｓafeaｎdreｌｉablｅB。shａllmａketheｐrｅstresｓingsｔeeｌbarｎotslipasmｕchaｓposｓibleｉｎthｅanｃhorageC。ｔeｃtoniccomplexＤ。ｉseａsytｏusｅTheｃoｒrectanｓwｅr:ＣFullSｃｏrｅ：4points：４（atotalｏｆ5ｍｕltipｌｅ-choiｃequestioｎs，atｏtalof２0points．)Scoｒe：2０１。thefoｌlｏwｉnｇeffectｉvemeasuｒestoreduｃethelossofprestresscａusｅdbyｓhrｉｎkageandｃreepｏfｃoｎcretｅarｅ（).A.useｓhigh-gｒａｄｅｃeｍｅｎtＢ.usesweｌlgradedagｇｒegateC.streｎｇtｈenｉngmaintｅｎａncｅＤ.ｒeducesｔhecoｍpａｃtnesｓｏfconcｒeteＴhｅcorｒeｃtａnswer：ABCFullScoｒe:4poinｔs：42。thｅｆoｌlowingreｑuiremｅnｔｓforｔhｅcｏnstrｕctionｏfpresｔrｅssｅdｍembｅｒsarｅｃｏrｒecｔ((））。ThenetspaｃiｎｇｏfA.heatｔreaｔedｓtｅｅlbaｒｓshａｌlnoｔｂｅｌｅssthan２0mmＢ.thｅthicknｅssoｆtheｃoncrｅteprotｅctionlayerｓｈalｌｂeｃａlculaｔedfromtｈehoｌewall.Theｂottoｍofthebeａｍshallnotbeｌｅssthａn４0mmＣ．reliａｂlｅmeaｓｕrｅｓshouldbetａkenｔｏｐrevｅｎtmetalcorrosiｏnD.ａlltｈｅｃoｍponentstｈatｎeedarcｈingmuｓtbearcｈｅdａtｔhesａmｅtimeａｓｔhecomｐｏｎｅnｔThecorrectansｗｅr:CDFulｌＳｃore：4pｏｉnｔｓ:4ＴhrｅeSeepiｃｔuresforquｅsｔioｎｓA。B。C.D．Thecｏrｒeｃｔansｗer:AＢCＤFullScｏre：4points:4４．，inthegenｅralｃonsｔｒｕcｔion，ｔheconcreｔesｔruｃｔｕrｅｍｅmber’ｓdｅfｏrｍatｉonhaｓｃeｒtainrequｅst，ｉtｓpurposｅlieｓin（）。A．eｎsｕｒestheuseoｆｂuｉｌdingsＢ.pｒeveｎtｓａｄverseeffectｓonstrｕctuｒalcomｐoｎｅntsC.ｐreｖenｔsundｅsｉrableeffｅctsｏｎnｏｎｓtructuralcomｐonｅntsD．ｅnsuresthatpeopleｆeelwithinacceｐtaｂleｌevelｓＴheｃorrectanswer:ＡＢCDFullSｃoｒe：４poｉnts:４5。thefollowingfaｃtorsthataffeｃtthecｕrvatuｒeductilｉtyｃoefｆｉcieｎtofflexuralmeｍbeｒｓａｒecorreｃt。A。loｎgｉtｕdｉｎalteｎsｉlesteelreinforｃｅmentｒatioincreaｓes，ductilitycoｅｆｆiｃiｅｎtdecreasesB．reｉnforcemenｔｒａtioｏfcoｍｐrｅｓsioｎsｔeelinｃreaｓｅs,duｃtilitｙcoeｆficientcanincreaｓeWhenthｅuｌtimａ