高层建筑薄弱连接混凝土楼板应力分析及抗震设计

383200831221(1200011;2100044)[],,,,,,,,,,,[]StructuralSeismicDesignandAnalysisofLinkingRCSlabinTall2buildingPAuthors:FuChangsheng1,LiuChunming2,LiYongshuang2,YingJun1(1ShanghaiChinaFuStructuralDesignInc.,Shanghai200011,China;2CivilKingSoftwareTechnologyCo.,Ltd.,Beijing100044,China)Abstract:Inseismicdesignofbuildings,floorsarehorizontalelementsofthelateralforceresistingsystem,whichplayanimportantroleintransferringanddistributionofthehorizontalforcesgeneratedbyearthquakeexcitationstoverticalelementsofthelateralforceresistingsystem.Thelinkingslab,connectingtwomainstructuresatitstwoends,istheweakplaceofthefloor.Aprocedureforanalysisofin2planstressesofthelinkingslabisproposed.Itisshownthatthepotentialout2phasemotionofthetwomainstructureswouldcausethestressconcentrationinvicinityofholesandcornersoftheslab,whichcouldbeobservedintheresultsobtainedbytimehistoryanalysis.Itissuggestedthattheformulafordesignofreinforcedconcretelinkingslabunderthehorizontalseismicactionwouldbetheexpressionsintermsoftheprincipaltensilestress.Keywords:horizontalelements;lateralforceresistingsystem;linkingslab;in2planestresses;mediumstrongseismicanalysis1(GB500112001)(),,,[2,3],,,,,B1a,1b,2[4],,,,,,90mmUBC297,ASCE7295,ACI318295[5](JGJ32002)()[6],4.31641318415811181012136,71012118101613,,,,2,,50%,30%,601,,,,,,,,,,215#310S11(01510-2MPa),,,,,,,,,,,,3,,,,,[1],116,42ETABS,,[7]4701411215#,L,L33113419m,1514m110lPb2,lPBmax35%,,L50%L,118m,413m,1514m28%1,5m;3132,517m,23128m,2198m951498138m102188m,1,7:,:15C50,C40,112:1),1;2),LlPb2,lPBmax35%;3),50%;4),()1124S1121ETABS,1SATWEETABS(s)21112101()17019160110198(0196+0102),01021100(0194+0106),0100(s)11941190()811573180199(0102+0197),01011100(0107+0193),0100(s)11601156()561774170105(0102+0103),01950101(0100+0101),0199DBJ082922003SHW2,SHW3SHW4310S11,ySHW3L,,,,,max1210,2131212mmax8011,4S11S11SHW410,20s,21,0112s,1158s,1108MPa,t=19198s719%,360%,t=520s412,,,,,,S=RsS(1):,=100P35=2186;SS;Rs,,RsRs=P(2),413,(MPa)2(s)max11,avg1k,1,31211001220146014601461162SHW2t=1819601541112SHW3t=1911801531110111711174111SHW4t=191300164113001200142014201421148SHW2t=1412001380180SHW3t=1814001381107018401842195SHW4t=91360132016601140130013001301106SHW2t=1916001400183SHW3t=1418001310164018501852198SHW4t=1919801521109ATC40[8],,,PUSHPEPDA()x[9]52106s,1P1260,1P229,,2168s2118s(2)Rs=0194655,f11,f22,f12m11,m22,m12v31,v32,[10],6,f11,f22,f12v31,v32m11,m22m12,,,,511901651218,,,(,),,,,,;,,,,,1k,ftk(3),ftk,1k,516142,110,,1,fyREAsvhshsin2+Ashhsvcos2(4):x;1,;RE=0185;s,h,Ass,vy,hx51614(4),(4)1,fyAsREhs(5)512,,,IBC,,[11](GB500102002)[12][13],,1REfyAsvhsh1+lPh012+fyAshhsv11-lPh012(6):l,,h0(4)(6),(6)fyAsREhs(7)(7)(5)IBC,,,(7)(5),(3),513,200,C40,ftk=2139MPa12@100,14@100;1Us1512@3005143MPa231,1k,=1117MPa,1,=4111MPaftk,,31,6,,(1),,,,,(2),,(37)011,NutsPdc,NuCFRP,16719kN,33518kN2Nub3NutsPdc6,,CFRP2,(1),,CFRP2,CFRP2(2)CFRP2Nu,b(3),CFRP,CFRP2,CFRP(4)CFRP,k=4,b=0,,[1],,.CFRP2[J].(),2005,21(6):6122615.[2].[M].:,2003:1258.[3].[M].:,2003.[4]OMARCHAALLAL,MOHSENSHAHAWAY.Performanceoffiber2reinforcedpolymer2wrappedreinforcedconcretecolumnundercombinedaxial2flexuralloading[J].StructureJournal,2000,97(4):6592668.[5]XIAOY,WUH.Compositebehaviorofconcreteconfinedbycarbonfibercompositejackets[J].JournalofMaterialinCivilEngineering,2000,112(2):1392146.[6],,.CFRP2[J].,2003:19(4):2722274.[7],,.CFRP2[J].,2006,23(1):1492153.[8],,.CFRP[J].,2004,20(2):16218.[9].[M].:,2002.[10],,.[J].,2005,22(1):50254.[11].[M].:,2003.[12],,.[J].,1999,20(1):10215.(110)(3),,,(4),,,(3)(4),:,[1].[J].,2006,27(2):40246.[2],.[J].,2004,20(3):32239.[3](GB500112001)[S].[4].[M].:,2005.[5]FARZADNAEIM,BOPPANARRAO.SeismicDesignofFloorDiaphragm,Chapter8oftheSeismicDesignHandbookeditedbyFarzadNaeim[M].Boston:KlowerAcademicPublishers,2001.[6](JGJ32002)[S].[7]Computers&StructuresInc.ETABSUsersManual[M].1999.[8]AppliedTechnologyCouncil.SeismicEvaluationandRetrofitofConcreteBuildings(ATC40)[S].1996.[9].PUSH&EPDA[M].2005.[10]PETERMARTI.Designofconcreteslabsfortransverseshear[J].ACIStructuralJournal,1990,87(2):1802190.[11]InternationalCodeCouncil.InternationalBuildingCode[S].2003.[12](GB500102002)[S].[13]NILSONAH,etal.DesignofConcreteStructures[M].NewYork:McGraw2Hill,2003.73