中国石油大学(北京)2012年混凝土在线作业答案（chinese petroleum university (beijing) 2012 concrete online work answer）

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1、中国石油大学(北京)2012年混凝土在线作业答案（Chinesepetroleumuniversity(Beijing)2012concreteonlineworkanswer）Inadditiontootherconditions,thesteelreinforcedconcretebeamscarrycapacitycomparedtotheconcretebeamsYouranswer:BTitlescore:0.5Score:0.5Note:thepresenceofsteelbarensuresthatthebeamwillcontinue

2、toworkAtthesametime,theanti-crackingabilityofreinforcedconcretebeamsiscomparedwiththatofplainconcretebeamsYouranswer:ATitlescore:0.5Score:0.5Note:thetensilestrainisverysmallwhentheconcretecracks,soeventhetensilestrengthofreinforcingsteelreinforcementisverysmallSection3reinforce

3、dconcretebeamsundernormalloadYouranswer:ATitlescore:0.5Score:0.5Note:thetensilepropertiesofconcreteareverypoor,andthebeamsareallworkingwithcracks4.Iftheconcreteisunderthree-to-stress,whenYouranswer:DTopicscore:0.5Score:0.5Remark:thepressureoftheringcanrestraintheconcreteexpansi

4、oncausedbylongitudinalpressure5.TheelasticmodulusofconcreteisreferredtoYouranswer:ATitlescore:0.5Score:0.5Remarks:conceptofconcreteelasticmodulus(20pages)Article6thelengthoftensilesteelanchoragespecifiedinthespecificationofconcretestructuredesign(gb50010-2002)Youranswer:CTitles

5、core:0.5Score:0.5Remarks:theanchoragelengthisproportionaltothetensilestrengthofthesteelbar,andthecompressivestrengthoftheconcreteisinverselyproportionaltothecompressivestrengthoftheconcreteThelowerthecarboncontentofsteel,thelowerthecarboncontentYouranswer:BTitlescore:0.5Score:0

6、.5Remarks:thelowerthecarboncontent,thebettertheplastic,andtherelationshipwiththestrengthisnotdirectlyrelatedArticle8.TheyieldstrengthofthesteelbarreferstoYouranswer:DTitlescore:0.5Score:0.5Note:theyieldstrengthisusedastheyieldstrengthforthereinforcementstrengthThereasonisthatth

7、esurfaceofreinforcedconcreteslabcracksinthesurfaceduringmaintenanceYouranswer:BTitlescore:0.5Score:0.5Remarks:concreteshrinkagecausescracksinconcrete,andcreepisanirreversibledeformationThefollowingstatementiscorrectforthecreepofconcreteYouranswer:BTopicscore:0.5Score:0.0Remarks

8、:mostofthecreepdeformationisnotrecoverablebutpartcanbe