13春学期《钢结构(二)》在线作业3

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1、13春学期《钢结构(二)》在线作业3NortheasternUniversity,14spring,13autumnEast,13springsemester,steelstructure(two)onlinehomework3Totalscore:100testtime:一RadioexaminationRadioexaminationquestions(20questions,100points)OneA.AB.BC.CD.DFullmarks:52.ofthemosteasytoproducestressbrittlefailurestateis■A.onewayco

2、mpressivestressstateB.threedirectiontensilestressstateThestressstateofC.twoisalwayspressingD.uniaxialtensilestressstateFullmarks:52.biaxialsymmetricI-shapedbeam,thestrengthandstiffnessofthebeamaresatisfiedbytheexperience,andthelocalbucklingofthewebundertheactionofbendingstressispossible.In

3、thecaseofotherconditionsunchanged,shouldadoptthefollowingschemein・A.increasesthethicknessofthewebB.reducesthecomputationalheightofthewebC.switchtohigherstrengthmaterialsD.setsidesupportFullmarks:5FourA.AB.BC.CD.DFullmarks:5FiveA.AB.BC.CD.DFullmarks:56.ofthebigslendernessratiooftheaxialcomp

4、onent,themosteffectivemeasurestoimproveitsoverallstabilityis・A.increasethesupportconstraintB.increasethestrengthofsteelC.increasetheradiusofgyrationD.reducesloadFullmarks:5Thefollowing7.kindofbeamplatetocalculatetheactualheightisequaltotheheightoftheweb・A.hotrolledsteelgirderA.cold-formedt

5、hin—walledsteelbeamsB.weldedcompositebeamC.rivetedcompositebeamFullmarks:5Theconnectionofhighstrengthbolt8.bearingtypesheardeformation.A.issmallerthanfrictiontypehigh-strengthboltB.islargerthancommonboltsC.isthesameascommonboltsD.islargerthanfrictiontypehighstrengthboltFullmarks:5standardt

6、ensileelongationand9.constructionsteelspecimengaugelengthelongationvalue・A.whentheyieldstressisreachedWhenB・reachestheultimatestressAfterplasticdeformationofC.specimenAfterthefractureoftheD.specimenFullmarks:5TenA.6B.8C.10D.12Fullmarks:511.inthesteelstructurehousing,choiceofsteel,thefollow

7、ingfactorsfactorsinisnotthemainconsideration.TemperatureatsiteofA.constructionB・loadpropertiesA.steelcostB.fireratingofbuildingsFullmarks:512.highstrengthbolttensilestrength・A.isrelatedtothemagnitudeofthepullB.isrelatedtothemagnitudeofpretensionTheC.isrelatedt