【MOOC】Structural Mechanics I-Beijing Jiaotong University 中國大學(xué)慕課MOOC答案

【MOOC】StructuralMechanicsI-BeijingJiaotongUniversity中國大學(xué)慕課MOOC答案Quiz-ClassificationofSupports1、【判斷題】Arereactionsshowninthefigurecorrect?本題答案：【錯(cuò)誤】2,1Quiz1、【判斷題】Thegeometricallyvariablesystemcannotinequilibriumunderanyload.本題答案：【錯(cuò)誤】2、【判斷題】Arigidbodycanbearodorageometricallyinvariantsystemcomposedofseveralrigidplates.本題答案：【正確】2.2Quiz1、【判斷題】Thedegreeoffreedomofageometricallyinvariantsystemmustbeequaltozero.本題答案：【錯(cuò)誤】2、【判斷題】Asystemwithredundantconstraintsmustbegeometricallyinvariant.本題答案：【錯(cuò)誤】2.3Quiz1、【單選題】Threerigidplatesconnectedbythreehingesare:本題答案：【Stable,unstable,orinstantaneouslyunstable】2、【判斷題】Ifthethreerigidplatesareconnectedbythreesinglehingesoranysixlinks,thesystemmustbegeometricallyinvariant.本題答案：【錯(cuò)誤】3、【判斷題】Ifthreerigidplatesareconnectedbythreevirtualhinges,whicharenotonthesamestraightline,thesystemisgeometricallyinvariantwithoutredundantconstraints.本題答案：【正確】4、【判斷題】Accordingtotheruleofthreerigidplates,thethreehingesarecollinear,soitisaninstantaneouslyunstablesystem.本題答案：【錯(cuò)誤】5、【判斷題】Themotionproducedbytheinstantaneouslyunstablesystemisverysmallandquicklytransformedintoageometricinvariantsystem,soitcanbeusedasanengineeringstructure.本題答案：【錯(cuò)誤】2.4Quiz1、【單選題】Thesystemiscomposedoftworigidplatesconnectedbythreelinks.Itis:本題答案：【Stable,unstable,orinstantaneouslyunstable】2、【判斷題】Tworigidplatesconnectedbythreelinksatonepointformageometricallyinvariantsystem.本題答案：【錯(cuò)誤】3、【判斷題】Thestructureisanunstablestructure..本題答案：【錯(cuò)誤】4、【判斷題】Thestructureshownbelowisastablestructure.本題答案：【錯(cuò)誤】5、【判斷題】TheconnectingpointObetweenlink1andlink2isavirtualhinge.本題答案：【錯(cuò)誤】2.5Quiz1、【單選題】Thestructureshownbelowis：本題答案：【錯(cuò)誤】2.7Quiz1、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithoutredundantrestraint】2、【單選題】Thefollowingstructuralsystemis:本題答案：【Instantaneouslyunstable】3、【判斷題】Intherulethattwoorthreerigidbodiesconstituteageometricallyinvariantsystem,notonlythenumberofnecessaryconstraints,butalsotheconditionsthattheseconstraintsmustsatisfyarespecified.本題答案：【正確】4、【判斷題】Inthesystemshowninthefigure,afterremoving1-5,3-5,4-5,2-5andfourlinks,thesimplysupportedbeam12isobtained,sothesystemisastablesystemwithfourredundantconstraints.本題答案：【錯(cuò)誤】5、【判斷題】Somesystemscanbeunstablebutwithredundantconstraints.本題答案：【正確】6、【判斷題】Thethreebasicrulesofplanegeometricinvariantsystemarerelatledwitheachother.本題答案：【正確】7、【判斷題】Theplanarsystemshowninthefigureisaninstantaneouslyunstablesystembecausea,BandCarecollinear.本題答案：【錯(cuò)誤】8、【判斷題】Inthefigurebelow,ACandBCformabinarysystem.Ifitisremovedinthegeometriccompositionanalysis,theremainingpartisanunstablesystem.Sotheoriginalsystemisalsoanunstablesystem.本題答案：【錯(cuò)誤】9、【判斷題】Asystemwithredundantconstraintsmustbegeometricallyinvariant.本題答案：【錯(cuò)誤】10、【判斷題】Intherulethattwoorthreerigidplatesconstituteageometricallyinvariantsystem,notonlythenumberofnecessaryconstraints,butalsothegeometricconditionsthattheseconstraintsmustsatisfyarespecified.本題答案：【正確】Homework1Unittest11、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithredundantrestraint(s)】2、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithoutredundantrestraint】3、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithredundantrestraint(s)】4、【單選題】Thestructuralsystemshallbedesignedtobe:本題答案：【Stable】5、【單選題】Thefollowingstructuralsystemhasthreeredundantrestraints.Toensurethatitisstillstable,whichtworestraintscannotberemovedatthesametime?本題答案：【aandb】6、【單選題】Thefollowingstructuralsystemis:本題答案：【Instantaneouslyunstable】7、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithoutredundantrestraint】8、【單選題】Thefollowingstructuralsystemis:本題答案：【Unstable】9、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithredundantrestraint(s)】10、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithoutredundantrestraint】11、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithoutredundantrestraint】12、【單選題】Thefollowingstructuralsystemis:本題答案：【Unstable】13、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithoutredundantrestraint】14、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithredundantrestraint(s)】15、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithoutredundantrestraint】16、【單選題】Thefollowingstructuralsystemis:本題答案：【Instantaneouslyunstable】17、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithredundantrestraint(s)】18、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithredundantrestraint(s)】19、【單選題】Thefollowingstructuralsystemis:本題答案：【Instantaneouslyunstable】20、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithredundantrestraint(s)】21、【單選題】Thefollowingstructuralsystemis:本題答案：【Unstablewithredundantrestraint(s)】22、【單選題】Thefollowingstructuralsystemis:本題答案：【Instantaneouslyunstable】23、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithredundantrestraint(s)】24、【單選題】Thefollowingstructuralsystemis:本題答案：【Instantaneouslyunstable】25、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithoutredundantrestraint】26、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithredundantrestraint(s)】27、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithredundantrestraint(s)】28、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithoutredundantrestraint】29、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithoutredundantrestraint】30、【單選題】Thefollowingstructuralsystemis:本題答案：【Stablewithoneredundantrestraint】3.1Quiz1、【單選題】Thegeometriccharacteristicsofstaticallydeterminatestructuresare:本題答案：【Stablewithnoredundantrestraint(s)】2、【單選題】Asshowninthefigure,thereactionforceatsupportA(upwardispositive)is:本題答案：【0】3、【單選題】TheverticalreactionofsupportCinthearchis:本題答案：【2.5P(upward)】4、【單選題】Asshowninthefigure,theverticalreactionoftheleftsupportofthehingedarchis:本題答案：【0】5、【單選題】Undertheactionofload,whichofthefollowingistrueforreactionsandinternalforcesofstaticallydeterminatestructure?本題答案：【Allofthemcanbeobtainedbystaticequilibriumcondition,andthenumericalvaluecanbedetermined.】6、【判斷題】Alltheinternalforcesandreactionsofstaticallydeterminatestructuresareobtainedonlyaccordingtotheequilibriumconditions,andthesolutionisunique.本題答案：【正確】7、【判斷題】Geometricallyinvariantsystemsmustbestaticallydeterminate.本題答案：【錯(cuò)誤】8、【判斷題】Theuniquenessofsolutionofstaticallydeterminedstructurereferstothatthereactionforce,internalforceanddeformationaredeterminedbystaticequilibriumconditionsonly.本題答案：【錯(cuò)誤】3.2Quiz1、【單選題】Theshapeofthemomentdiagramshowninthediagramis:本題答案：【Itiscorrectundercertainconditions】2、【判斷題】Thebendingmomentdiagramshowninthefigureiscorrect.（）本題答案：【錯(cuò)誤】3.3Quiz1、【單選題】Thesectionwherethebendingmomentdiagramhasabruptchangeis:()本題答案：【Sectionwithconcentratedcouple】2、【判斷題】ThebendingmomentofABinthestructureshowninthefigureisconstant.本題答案：【正確】3、【判斷題】TheMdiagramofthestructureinFig.AisshowninFig.B.本題答案：【正確】4、【判斷題】TheinternalforceofABiszero.本題答案：【Bendingmomentisnot0,shearforceis0】3.4Quiz1、【單選題】Asshowninthefigure,thebendingmomentofthemidspansectionofABbeamis:本題答案：【10kN-m,tensionatbottom】2、【單選題】ThemomentatsectionDforthebeamshownbelowis:本題答案：【18kN-m(bottomissubjectedtotension)】3、【判斷題】Thesuperpositionoftwobendingmomentdiagramsdoesnotrefertothesimplecombinationofthefigures,butreferstothesuperpositionofthebendingmomentordinatescorrespondingtothetwodiagrams.本題答案：【正確】4、【判斷題】ThefollowingfigureshowstheMdiagramofthebeam.本題答案：【錯(cuò)誤】5、【判斷題】Isthebendingmomentdiagramofthestructureshowninthefigurebelowcorrect?本題答案：【正確】3.6Quiz1、【單選題】Howwilltheloadloadactingonthefundamentalpartofthestaticmulti-spanbeamonthesubsidiarypart?本題答案：【Absolutelynointernalforce】2、【單選題】Asshowninthefigure,thebendingmomentofsectionCofmulti-spanstaticallydeterminatebeamisequalto:本題答案：【Pl/2（bottomissubjectedtotension)】3、【單選題】Asshowninthefigure,thebendingmomentofsectionKis:本題答案：【5kN?m】4、【判斷題】Whentheloadactsonthesubsidiarypartofthestaticallydeterminatemulti-spanbeam,theinternalforceofthefundamentalpartisnotzero.本題答案：【正確】5、【判斷題】Whentheexternalloadactsonthefundamentalpart,thesubsidiarypartisnottakingtheload;whentheexternalloadactsonacertainsubsidiarypart,thewholestructuremusttaketheload.本題答案：【錯(cuò)誤】6、【判斷題】Thediagramshowsthestaticallydeterminatestructure.Undertheactionofhorizontalload,ABisthefundametalpartandBCisthesubsidiarypart.本題答案：【錯(cuò)誤】8、【判斷題】Asshowninthefigure,theloadPonthebeamwillgenerateinternalforceinCD.本題答案：【錯(cuò)誤】9、【判斷題】Theshapeofthebendingmomentdiagramshowninthefigureiscorrect.本題答案：【(M)EG=16kN-m(lowersideissubjectedtotension),(Fs)BA=8kN】2、【單選題】Asshowninthefigure,thebendingmomentatC-endofCDintherigidframeis:本題答案：【0】3、【單選題】Asshowninthefigure,thebendingmomentatB-endofmemberBAis(assumingtheleftsidesubjectedtotensionispositive)is:本題答案：【3Pa】4、【單選題】Accordingtothestructureshowninthefigure,thebendingmomentatD-endofmemberDCis(assumingthatthelowersidesubjectedtotensionispositive):本題答案：【－Pa/2】5、【單選題】WhichofthefollowingiscorrectforbothMACandMBD?本題答案：【Pa(leftsideissubjectedtotension）】7、【判斷題】Forthestructurebelow,themomentatBendofmemberBCMBC=ql^2/2(positiveisbottomissubjectedtotension).本題答案：【錯(cuò)誤】8、【判斷題】Forthestructurebelow,Mk=ql^2/2(insideissubjectedtotension).本題答案：【錯(cuò)誤】9、【判斷題】Themomentdiagramiscorrect.本題答案：【錯(cuò)誤】3.9Quiz1、【單選題】Asshowninthefigure,thehorizontalthrustatthesupportofthreehingedarchis:本題答案：【20kN】2、【單選題】Inthethree-hingedarchshownbelow,ifthehorizontalthrustH=P/3,theheighttospanratiof/lshouldbeequalto:本題答案：【錯(cuò)誤】7、【判斷題】Thehorizontalthrustofthearchshownbelowis3ql/4.本題答案：【正確】8、【判斷題】ThemomentofKsectionofthearchbelow(M)=ql^2/32(lowersideissubjectedtotension).本題答案：【錯(cuò)誤】9、【判斷題】Thesystemshowninthefigureisarchstructure.本題答案：【錯(cuò)誤】3.10Quiz1、【單選題】Inthetrussshowninthefigure,theaxialforcesofmembers1and2are:本題答案：【】2、【單選題】TheinternalforceofmemberABshowninthefigureis:本題答案：【0】3、【單選題】Inthetrussshowninthefigure,theaxialforcesofmembers1and2are:本題答案：【】5、【單選題】Theinternalforceofmemberbis:本題答案：【Smallatbothends,largeinthemiddle】7、【判斷題】TheinternalforceofmemberABbarthestructure5Pd/(2h).本題答案：【錯(cuò)誤】8、【判斷題】TheinternalforceofmemberAshowninthefigureis—P.本題答案：【8】2、【單選題】Theinternalforcesofmembers1,2and3showninthefigureare:】3、【判斷題】Thetrussshownherehas9zeroforcemembers.本題答案：【正確】4、【判斷題】Theinternalforceofmember1iszero.本題答案：【正確】5、【判斷題】Thetrussshowninthefigurehasthreezeroforcemembers.本題答案：【錯(cuò)誤】6、【判斷題】圖示結(jié)構(gòu)A桿的內(nèi)力為P/2。本題答案：【正確】7、【判斷題】Theinternalforcesinmembers1and2areFN1=-FN2=P.本題答案：【錯(cuò)誤】8、【判斷題】Theinternalforceofmemberais1.4142P.本題答案：【錯(cuò)誤】3.12Quiz1、【單選題】Theaxialforceofmember1is:本題答案：【】3、【單選題】Inthestructureshowninthefigure,theinternalforceofmemberais:本題答案：【2P】4、【判斷題】Inthecompositestructure,theinternalforceofchainbar(trusstypemember)isaxialforce,andtheinternalforceofbeamtypememberisonlybendingmomentandshearforce.本題答案：【錯(cuò)誤】5、【判斷題】TheaxialforceofmemberABisP(tension).本題答案：【錯(cuò)誤】6、【判斷題】Inthestructureshowninthefigure,ifthereactionforceofsupportisknown,theaxialforceofmemberCDcanbeobtainedfromtheequilibriumconditionofjointD.本題答案：【錯(cuò)誤】7、【判斷題】Inthestructureshowninthefigure,membersACandCBdonotgeneratebendingmoment.本題答案：【錯(cuò)誤】8、【判斷題】Asshowninthefigure,theaxialforceofmemberDEis30kNundertheactionofload.本題答案：【錯(cuò)誤】9、【判斷題】Asshowninthefigure,theaxialforceofmember1is0.本題答案：【正確】11、【判斷題】ThebendingmomentofsectionAis40kN-m(counterclockwise).本題答案：【錯(cuò)誤】homework2homework3homework4homework5Unittest31、【單選題】TheinternalforceinmemberCDis___?本題答案：【-2P】2、【單選題】Theaxialforceinmemberais___?本題答案：【0】3、【單選題】TheaxialforceinmemberABis___?本題答案：【-P】4、【單選題】TheinternalforceinmemberABis___?本題答案：【】5、【單選題】Theaxialforceinmember1is___?本題答案：【】6、【單選題】TheaxialforceinmemberFGis___?本題答案：【-200kN】7、【單選題】Theaxialforceinmemberais___?本題答案：【】8、【單選題】TheshearforceatSectionCinmemberCAis___?本題答案：【-3P】9、【單選題】TheshearforceatSectionBinmemberBCis___?本題答案：【】10、【單選題】TheshearforceatSectionBinmemberBCis___?本題答案：【-150kN】11、【單選題】TheshearforceatSectionAinmemberABis___?本題答案：【qa】12、【單選題】ThemomentatSectionEinmemberEDis___?(assumethemomentispositivewhentherightsideissubjectedtotension.)本題答案：【-3Pa】13、【單選題】ThemomentatSectionCinmemberCAis___?(assumethemomentispositivewhentherightsideissubjectedtotension.)本題答案：【56kN?m】14、【單選題】ThemomentatSectionFinmemberFCis___?(assumethemomentispositivewhenthebottomissubjectedtotension.)本題答案：【-2kN?m】15、【單選題】Forthestructurebelow,assumeP=30kN,m=120kN?m.ThemomentatSectionBinmemberBAis___?(assumethemomentispositivewhentherightsideissubjectedtotension.)本題答案：【-50kN?m】16、【單選題】Whichstatementistrueforand?本題答案：【,(leftsideissubjectedtotension）；】17、【單選題】ThemomentatSectionAis___?(assumethemomentispositivewhenthebottomissubjectedtotension.)本題答案：【－m；】18、【單選題】Theaxialforceinmemberais___?本題答案：【4P】19、【單選題】TheaxialforceinmemberBCis___?本題答案：【－P;】20、【單選題】Howmanyzero-forcemembersarethereinthistruss?本題答案：【9】21、【單選題】Forthetrussbelow,whichoneiscorrect?本題答案：【】22、【單選題】Howmanyzero-forcemembersarethereinthistruss?本題答案：【5】23、【單選題】Theaxialforceinmember1is___?本題答案：【0】24、【單選題】Theaxialforcesinmembers1and2are___?本題答案：【】25、【單選題】Theaxialforcesinmembers1and2are___?本題答案：【】26、【單選題】Theaxialforceinmemberais___?本題答案：【-3P】27、【單選題】Howmanyzero-forcemembersarethereinthistruss?本題答案：【9】28、【單選題】Theaxialforceinmembercis___?本題答案：【P】29、【單選題】Theaxialforcesinmembers1and2are___?本題答案：【】30、【單選題】Theaxialforcesinmembers1and2are___?本題答案：【】31、【單選題】Theaxialforceinmemberais___?本題答案：【】32、【單選題】Howmanyzero-forcemembersarethereinthistruss?本題答案：【7】33、【單選題】Theaxialforcesinmembers1and2are___?本題答案：【-2P,P】34、【單選題】Theaxialforceinmember1is___?本題答案：【0】Unittest21、【單選題】ThereactionsatsupportAare本題答案：【】2、【單選題】ThemomentatsectionCis：本題答案：【0】3、【單選題】ThemomentatjointBis：本題答案：【Allabovethreeoptionsarepossible.】4、【單選題】Inthefollowingstructure:本題答案：【】5、【單選題】Inthefollowingstructure,momentatsectionsAandCare(assumethatitispositivewhenthebottomissubjectedtotension):本題答案：【】6、【單選題】Internalforcesinadeterminatestructureare:本題答案：【notrelatedtothestructure’sEI】7、【單選題】MomentatsectionCforthemulti-spandeterminatebeamshownbelowis:本題答案：【Pl/2(bottomissubjectedtotension)】8、【單選題】TheshearatsectionbelowKforthestructureshownbelowis:本題答案：【0】9、【單選題】Whatwillforcesactingonfundamentalpartsdotothesubsidiaryportions?本題答案：【Definitelywillnotgenerateinternalforces】10、【單選題】MomentatsectionKforthestructureshownbelowis(assumethatitispositivethenthebottomissubjectedtotension):本題答案：【】11、【單選題】ShearatsectionAforthestructureshownbelowis:本題答案：【-P/2】12、【單選題】MomentatsectionCinmemberCAandshearatsectionCinmemberCBforthestructureshownbeloware:本題答案：【(leftsideissubjectedtotension),;】13、【單選題】MomentatsectionBinmemberBCforthestructureshownbelowis:本題答案：【80kN?m(bottomissubjectedtotension)】14、【單選題】Choosethecorrectmomentdiagram:本題答案：【】15、【單選題】ThemomentreactionatsupportBis(assumethatitispositivewhentherightsideissubjectedtotension):本題答案：【】16、【單選題】ThemomentatsectionKforthestructureshownbelowis:本題答案：【12kN?m(rightsideissubjectedtotension)】17、【單選題】Forthebeamshownbelow,if,thexcoordinateofpointCis：本題答案：【4m】18、【單選題】Forthetwostructuresshownbelow,whichstatementistrue?本題答案：【Momentdiagramisthesame,axialforcediagramisdifferent】19、【單選題】Forthestructureshownbelow,whichstatementistrueforthemomentatEinmemberEGandshearatBinmemberBA?本題答案：【(bottomissubjectedtotension)】20、【單選題】Forthestructureshownbelow,thememberendmomentsatjointBare(assumethatitispositivetheninsideissubjectedtotension):本題答案：【】21、【單選題】Forthestructureshownbelow,themomentatsectionCinmemberCDis:本題答案：【0】22、【單選題】Forthestructureshownbelow,momentatsectionBinmemberBAis(assumethatitispositivethentheleftsideissubjectedtotension):本題答案：【3Pa】23、【單選題】Forthestructureshownbelow,momentsatsectionDinmemberDCis(assumethatitispositivewhenthebottomissubjectedtotension):本題答案：【－Pa/2】24、【單選題】ThereactionatsupportAis(assumethatitispositivewhentheforceisup):本題答案：【0】25、【單選題】Forthestructureshownbelow,themomentreactionatsupportAis:本題答案：【2kN·m,(rightsideissubjectedtotension)】26、【單選題】Forthestructureshownbelow,whichstatementistrueforand?本題答案：【(leftsideissubjectedtotension)】27、【單選題】Forthemulti-spandeterminatebeamshownbelow,themomentatKis(assumethatitispositivewhenthebottomissubjectedtotension):本題答案：【5kN?m】28、【單選題】WhichMdiagramiscorrect?本題答案：【】29、【單選題】Forthethree-hingedarchshownbelow,horizontalreactionatsupportsAandBare:本題答案：【】30、【單選題】Forthethree-hingedarchshownbelow,thehorizontalthrustis:本題答案：【2.5kN】31、【單選題】Thesupportreactionsforthethree-hingedarchareshownbelow.WhichstatementistruefortheaxialforceatarandomsectionK(assumethatitispositivewhenthememberissubjectedtocompression):本題答案：【】4.2隨堂測驗(yàn)1、【判斷題】Virtualdisplacementreferstothesmalldisplacementwhichisconsistent(smoothandcontinuous)inthedeformedbodyandsatisfiestheboundaryconditions.本題答案：【正確】2、【判斷題】Thevirtualofvirtualdisplacementreferstotheunrealdisplacement,whichisonlyanillusion.本題答案：【錯(cuò)誤】3、【判斷題】Theforceanddisplacementstatesdiscussedintheprincipleofvirtualworkaretwoindependentstates.本題答案：【正確】4、【判斷題】Theprincipleofvirtualworkofrigidbodysystemcanbeexpressedasfollows:undertheactionofanyforcesystem,thetotalvirtualworkofallactiveforcesontherigidbodysystemonanyinfinitesimalrigidbodydisplacementconformingtotheconstraintconditionsisequaltozero.本題答案：【錯(cuò)誤】4.3隨堂測驗(yàn)1、【單選題】WhencalculatingtherotationofthesectionontheleftofhingeCinthefigure,thevirtualforcestateshouldbetakenasfollows:本題答案：【】2、【單選題】WhencalculatingtherelativelineardisplacementoftwopointsAandB,theunitforceappliedattwopointsinthevirtualforcestateis:本題答案：【ReverseforceinthedirectionofAB】3、【單選題】欲直接計(jì)算桁架桿BC的轉(zhuǎn)角，則虛設(shè)力系應(yīng)為：本題答案：【】4、【判斷題】Theunitloadmethodissuitableforframedstructurewithanymaterialpropertiesandexternalloads.本題答案：【正確】5、【判斷題】Thegeneralformulaofdisplacementcalculationcanonlybeusedtocalculatelinearelasticstructure.本題答案：【錯(cuò)誤】6、【判斷題】Thephysicalmeaningofthetermontheleftsideisthedisplacementofthemembersection.本題答案：【錯(cuò)誤】7、【判斷題】Whenusingtheprincipleofvirtualworktosolvethestructuraldisplacement,inordertoonlyincludethedisplacementtobesolvedinthevirtualworkequationandnolongercontainotherunknowndisplacements,itisonlynecessarytosetupacorrespondingunitloadinthedirectionofthedisplacementtobesolved.本題答案：【正確】8、【判斷題】TheunitforceofthevirtualforcestateofthetrussundertheactionofacertainfactorisshowninthefigurewhencalculatingtherotationofmemberCD.本題答案：【錯(cuò)誤】4.4隨堂測試1、【單選題】Forthetrussshowninthefigure,EA=constant.Thehorizontaldisplacementofjoint8undertheloadshowninthefigureis:（）本題答案：【36/EA】2、【單選題】Whencalculatingthedisplacementofcompositestructure:本題答案：【Bendingmomentandaxialforceareconsidered】3、【單選題】圖示結(jié)構(gòu)（EA=常數(shù)），C點(diǎn)的豎向位移（向下為正）為：本題答案：【】4、【判斷題】Undertheactionofload,thedisplacementofrigidframeandbeamismainlycausedbythebendingdeformationofeachmember.本題答案：【正確】5、【判斷題】Asshowninthefigure,EIandEAofeachmemberarethesame.TherelativerotationofleftandrightsectionsofhingeBiszero.本題答案：【錯(cuò)誤】6、【判斷題】ThesizeofthemembersectioninthetrussbelowhasaneffectontheverticaldisplacementofpointC.本題答案：【錯(cuò)誤】7、【判斷題】Thediagramshowsthevirtualforcesystemoftherigidframe.Accordingtotheforcesystemandthedisplacementcalculationformula,therotationofmemberACcanbecalculated.本題答案：【正確】8、【判斷題】TheverticaldisplacementofpointDiszeroundertheactionofload..本題答案：【錯(cuò)誤】4、【判斷題】TosolvetheverticaldisplacementofpointA,theanddiagramsareasshown.Basedongraphmultiplicationmethod,.本題答案：【正確】5、【判斷題】Thewidthofthestructureshowninthefigureis2/3oftheheight.UndertheactionofloadP,thehorizontaldisplacementdirectionofpointBistotheright.本題答案：【正確】4.6隨堂測試1、【單選題】Fortheframeshownbelow,EIisaconstantforeachmember,la0，thehorizontaldisplacmentofBis：本題答案：【Totheright.】2、【單選題】TherotationofsectionAinthefigurebelowis(assumethatclockwiseispositive)：本題答案：【】3、【單選題】Fortheframeshownbelow,EI=constant，thelengthofeachmemberisl，therotationofsectionAis：本題答案：【clockwise,】4、【單選題】EIisthesameforeachmemberoftheframeshownbelow,theverticaldisplacementofpointCis:本題答案：【】5、【單選題】TheinternalforcediagramofthestructureinFigureaisshowninFigureb.TherodsEIandEAareconstant.TherelativecornersofthecrosssectionsonbothsidesofhingeBare：本題答案：【0】6、【單選題】EIandEAarethesameforeachmemberofthestructurebelow,therelativedisplacmentbetweenpointsKandHis：本題答案：【】7、【判斷題】EI=constantforthebeambelow,verticaldisplacementofpointCis:本題答案：【錯(cuò)誤】8、【判斷題】TherotationofsectionCofthebeambelowis(clockwise):本題答案：【錯(cuò)誤】4.7隨堂測驗(yàn)1、【單選題】Whenthetemperatureofstaticallydeterminatestructurechanges:本題答案：【Thereisdeformation,displacementandnointernalforce;】2、【單選題】ThemembersectionofthebeamABisrectangle,thesectionheighth=d/4，thetemperatureonthetopisincreasedbyt℃，thetemperatureatthebottomremainsunchanged.TherelativedistancebetweenCandDis：本題答案：【Closer,】3、【單選題】Thetemperaturechangeoftrussmembersisshowninthefigure,andthelinearexpansioncoefficientisα，ThenthehorizontaldisplacementofpointCis:本題答案：【Totheleft,】4、【單選題】Asshowninthefigure,whenthetemperatureincreaseT1T2,thedisplacementsofpointsCandDareasfollows:本題答案：【Decrease】6、【判斷題】ThetemperatureoftheBCrodofthestructureshowninthefiguredecreasesbyt℃,andthelinearexpansioncoefficientisα,thentheverticaldisplacementofpointAis.本題答案：【錯(cuò)誤】7、【判斷題】ThetemperatureoftheBCrodofthestructureshowninthefiguredecreasesbyt℃,andthelinearexpansioncoefficientisα,thentheverticaldisplacementofpointAis.本題答案：【正確】4.8隨堂測驗(yàn)1、【單選題】Asshowninthefigure,thedownwarddisplacementofrigidframesupportAisa,andtherotationangleisα,thentheverticaldisplacementofendB:本題答案：【】3、【單選題】Leta,b,andφbethehorizontalmovement,verticalmovementandrotationofthesupportAofthestructureshowninthefigure,andthehorizontaldisplacementofpointB(positivetotheleft)causedbythisis:本題答案：【】4、【判斷題】Ifeachrodintherigidframehasnointernalforce,thereisnodisplacementintheentirerigidframe.本題答案：【錯(cuò)誤】5、【判斷題】Thestructureshowsthesupportmovementasshowninthefigure,andthehorizontaldisplacementofnodeBis0.0021cm.本題答案：【錯(cuò)誤】4.9隨堂測試1、【單選題】設(shè)圖示桁架中桿件DE比設(shè)計(jì)尺寸做短了2cm，則結(jié)點(diǎn)B的豎向位移為：本題答案：【1cm↓】2、【單選題】欲使E點(diǎn)有向上的豎向位移0.04m，須使BC桿加長的長度為：本題答案：【8/5cm】3、【判斷題】圖示桁架中，桿CD加工后比原尺寸短一些，裝配后B點(diǎn)將向右移動。本題答案：【錯(cuò)誤】4.10隨堂測驗(yàn)1、【單選題】Thefourreciprocaltheoremsapplyto:本題答案：【Linearelasticsystem】2、【單選題】(a)and(b)aretwostatesofthesamestructure.Tomaketheverticaldisplacementofstate(a)at1pointequaltotwicethehorizontaldisplacementofstate(b)at2points,youshould:,andthedimensionofandare:本題答案：【δ=φ】5、【判斷題】Thetheoremofdisplacementreciprocityis:thedisplacementcausedbythesecondforceinthedirectionofthefirstforceisequaltothedisplacementcausedbythefirstforceinthedirectionofthesecondforce.本題答案：【錯(cuò)誤】6、【判斷題】Inthedisplacementreciprocaltheorem,thereciprocalrelationshipbetweenlineardisplacementandangulardisplacementcanbeestablished:.Here,andarejustthesamevaluebutdifferentdimension.本題答案：【錯(cuò)誤】homework6homework7Unittext41、【單選題】Inthefigureasshownbelow,thegeometricdimensionsofthetwoframesarethesame,buttherigidityisdifferent.Whenaconcentratedforceisactingatthemid-spanofthebeam,thepointsonthetwoframeshave本題答案：【samedisplacementbutdifferentinternalforces;】2、【單選題】Forthestructurewithfundamentalandaccessoryparts,whichstatementsiscorrect?本題答案：【Theloadactingontheaccessoryparthasimpactontheinternalforceanddisplacementofthefundamentalpart.Theloadactingonthefundamentalparthasnoimpactontheinternalforceoftheaccessorypart,butmayhaveimpactonthedisplacementoftheaccessorypart.】3、【單選題】Asshowninthefigure,ifla0andtheaxialdeformationisneglectedfortherigidframe,whichstatementistrueforthehorizontaldisplacementofpointB?本題答案：【Thevaluedependsonaandthedirectionistoright.】4、【單選題】Forthedeterminatebeamshownbelow,whenEI2increases,thedisplacementatpointDwill:本題答案：【notchange;】5、【單選題】Theprincipleofvirtualworkisapplicableto:本題答案：【Alloftheabove.】6、【單選題】Reciprocaltheoremisapplicableto:本題答案：【Elasticbody;】7、【單選題】Whichofthefollowingstatementistrue?本題答案：【Ifthereisinternalforce,theremaynotbedisplacement.Ifthereisdisplacement,theremaynotbeinternalforce.】8、【單選題】Whencalculatingthedisplacementofbeamsandframes,whichofthefollowingstatementistrue?本題答案：【W(wǎng)hethertheaxialdeformationcanbeneglecteddependsonthetypeoftheload;andwhetherthesheardeformationcanbeneglecteddependsonthemembergeometry.】9、【單選題】TheunitloadmethodisadoptedinordertocalculatetheverticaldisplacementofpointKofthe