外文翻译---防屈曲支撑在亚洲的地位

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1、附录1英文文章翻译（原文）Stateoftheartofbuckling-restrainedbracesinAsiaQiangXieDepartmentofStructuralEngineering,TongjiUniversity,Shanghai200092,ChinaReceived3September2004;accepted19November2004Abstract：Thispaperpresentsasummaryofbuckling-restrainedbraces(BRBs).BRBsshowthesameloaddeform

2、ationbehaviorinbothcompressionandtensionandhigherenergyabsorptioncapacitywitheasyadjustabilityofbothstiffnessandstrength.ResearchanddevelopmentsofvarioustypesofBRBswithdifferentconfigurationsinAsia,especiallyinJapan,areintroduced.Analysesandexperimentsareillustratedtoshowthec

3、onditionsnecessaryforrestrainingsteelbracesfrombuckling.SomekeyissuesofBRBconfigurations,suchasgapanddebondingprocessingbetweencorebracesandencasingmembers,contractionallowanceinBRBsandnecessaryclearancesbetweenrestrainingpanelsandsurroundingframes,BRBprojectionstiffeningappr

4、oachestopreventitfrombuckling,arealsodescribed.Basedoninitialdeflectionsofcorebraces,bothstiffnessandstrengthrequirementsofencasingmembertopreventbucklingofcorebracearegiven.Applicationsforbothnewhigh-risesteelbuildingsandtheseismicretrofitofexistingbuildingsshowgoodprospects

5、ofusingBRBs.©2004ElsevierLtd.Allrightsreserved.Keywords:Steelframe;Buckling;Buckling-restrainedbraces;Cyclicloadingtest;Damper;Hystereticbehavior1.IntroductionLateraldisplacementsonstructuralbuildingshavebeenofgreatconcernforengineers.Inordertominimizetheeffectofearthquakeand

6、windforcesbraceshavebeenusedsuccessfully.However,whenthebracesaresubjectedtolargecompressiveforcestheyexhibitbucklingdeformationandshowunsymmetricalhystereticbehaviorintensionandcompression,andtypicallyexhibitsubstantialstrengthdeteriorationwhenloadedmonotonicallyincompressio

7、norcyclically,asshowninFig.1(a).Ifbucklingofasteelbraceisrestrainedandthesamestrengthisensuredbothintensionandcompression,theenergyabsorptionofthebracewillbemarkedlyincreasedandthehystereticpropertywillbesimplified.Theserequirementsmotivateresearchersandengineerstodevelopanew

8、typeofbrace,buckling-restrainedbrace(BRB).TheconceptofBRBissimple:re