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401201013,(,100084)[],,,k,,kk,k(),[];;;;ResearchondesignmethodofbucklingrestrainedbracedframesZhaoYing,GuoYanlin(CivilEngineeringDepartment,TsinghuaUniversity,Beijing100084,China)Abstract:Thebehaviordifferencesofbucklingrestrainedbracesframes(BRBF)andconcentricallybracedframes(CBF)havebeenresearchedbynumericalexamples.Basedonalargenumberofelasto2plastictime2historyanalysisofBRBFexamples,therelationshipbetweenmaximumstorydriftandlateralstiffnessratiokisestablishedforBRBFsubjectedtolargeearthquakes,andaccordingtocurrentChinesecodesforstructuraldesign,areasonablerangeoflateralstiffnessratiokisrecommended.Theweakestpureframesareachievedfordifferentkvalues,whicharethereferenceforpreliminarydesignofBRBF.Keywords:bucklingrestrainedbraces(BRB);bucklingrestrainedbracedframes(BRBF);concentricallybracedframes(CBF);lateralstiffnessratio;designmethod3(20060003045):,,Email:ying2zhao02@mails.tsinghua.edu.cn0,,,11,,,2,,,,,[123],,,:(1):[4],,,[5],[6][4],,(2):[7],,[8],,,,2383:,,,,,,,;,,,,,,8,,,400gal(4mPs2)11116ElCentroEW54,,,,ANSYS,Beam,Link,Q345,Q235,111113,41006(=147)160316(=8815),1P500,4,,,,,,,,,5,,,;,,,1111235,4m,8m,,3,2A1=2256mm2,A2=976mm21006(=147)654(=227),160316(=8815)100215(=142),1P500:6kNPm2,2kNPm2,,110+015RayleighElCentroEW,6,,1P601P76,1P83,28%10%,11113,,,;,,,,7,937,,,79%,31%,,112,:,,,,,,,;,,,,,,,11211,,8,,KD:KD=2EAsincos2Ph()EAsincos2Ph()(1)8,fy,Fy:Fy=2Afycos()Afycos()(2):uy=FyPKD=hfyPEsincos(3)(3),fyh,A(),Q235,3060,:1P438Dy1P380(4)(4),Dy1P300,,,,,,11212,,,35,99310,10,10,,,,,,;,,,k,:04k=KDPKF(5)KFD,,KF,k1310125118,k,[9],[10]k,,k2,[5],[6]3,k,,k3,,,k,,2,:,,;,,,(1P50)[11],,k,,,,,BuildingCenterofJapanArchitecturalCenter,8,18(11),T215s,8,;T215s,8,,,119401940199519951952195219781978ElCentroElCentroKobeKobeTaftTaftTohokuUnivTohokuUnivEWNSEWNSN21ES69EEWNSPGAPcmPs2210110341100617114817182152170175190202160258120TdPs5314653146501005010054138541384019440194211k5,10,15,203,:5m,4m,8m,6m,26kNPm2,2kNPm2,,110+015Rayleigh2Pmm201510515650650363661060060030301115550550242416205005002020120I5003501218156006003030610550550242411155005002020115I50030010161545045024246104004002020110I500250101615400400202015I4502001016,9k(0,015,1,115,2,215,3,4,5)(,14),,,12155,10,15,20()(16),:(1)15,20,,,,(2)(k=0),,1P300,,,(3),k,k,;k,,,:015k2(4),,k=2,1P67,1P50,,,,,,212k(k=015,1,115,2),,,(17),k,,,,,17,k,,1P3001P50,k33k01511152[]1P3801P3101P2751P250:[]k,,,,3,,,213(1)141515201617k=015,1,115,224,,1P250,,(2)DKFi3,ki,015ki2,KDi,Ai:Ai=KDihP2Esincos2(6)(3)(4),(5)(6),5,;,,214312,21121411,4124Pmm1450050020205845045018189124004001616112I4402508161P300=1P2531P250,,,21412,D,KFi,5D5KKFiPNPm912:016694:013347:012508:0114341842047758:014180:012090:011729:0109462002073924:012742:011371:011206:010642210767921:013428:011714:013597:01309239077331,=1P2533,ki=2,6691258241KDiPNPm36840954400414774215358378154661AiPmm21012110011583113,1P407,1P30021413185,4ElCentroEW,TohokuUnivEW,KobeNS,TaftN21E(1),,18312,1P58,3(1),,(2),,k,,k:015k2(3)k=015,1,115,2,(),k,,,3,k,,(4),,,k,(5)8,(85)34;A;fePN(Ne,N)[7]3,,,,6,1=11+16(ePh)2(2),3,5NePy6:N=1Af(3)(1),(3),7,(1),;(3)016y,7,ePy016,(3)(1),75(1),(2)ePy016,Ne,ePy016e016y,016y(3)[1]GB500032001[S].:,2001.[2],,,.[J].,2006,22(3):68271.[3],.[J].,2006(2).[4]BRYANDE,MERVYNJK.Compressivebehaviorofunconfinedandconfinedclaybrickmasonry[J].JournalofStructuralEngineering,2004,130:6502661.[5]GBJ12990[S].:,1994.[6].()[M].:,2003.[7],.[J].2003,33(3).[8].[M].:,2003.(43)[1]WAKABAYASHIM,NAKAMURAT,etal.Experimentalstudyontheelasto2plasticbehaviorofbracesenclosedbyprecastconcretepanelsunderhorizontalcyclicloading:parts1and2[R].SummariesofTechnicalPapersofAnnualMeeting,ArchitecturalInstituteofJapan,StructuralEngineeringSection.10:104121044.[2]KIMURAK,YOSHIZAKI,TAKEDAT.Testsonbracesencasedbymortarin2filledsteeltubes[C]PPSummariesofTechnicalPapersofAnnualMeeting,ArchitecturalInstituteofJapan,1976,1041:1242.[3]FUJIMOTOM,WADAA,etal.Astudyontheunbondedbraceencasedinbuckling2restrainingconcreteandsteeltube[J].JournalofStructuralandConstructionEngineering,(34B):2492258.[4]KIMJ,SEOY.Seismicdesignoflow2risesteelframeswithbuckling2restrainedbraces[J].EngineeringStructures,2004,26(5):5432551.[5].[D].:,2005.[6],,.[J].,2005,35(8):18223.[7]CHOIH,KIMJ.Energy2basedseismicdesignofbuckling2restrainedbracedframesusinghystereticenergyspectrum[J].EngineeringStructures,2006,28:3042311.[8].[D].:,2007.[9]KAZUOINOUE.Hysteresis2typevibrationdampers2designofsteelframesincorporatinghystereticvibrationdampers(1)[J].SteelConstructionToday&Tomorrow,2004(7):426.[10]KAZUOINOUE.Hysteresis2typevibrationdampers2designofsteelframesincorporatinghystereticvibrationdampers(2)[J].SteelConstructionToday&Tomorrow,2004(8):426.[11]GB500112001[S].:,2001.58