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©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(11)(21):,5,,,:,1,,,112,20%,,015,015110,1,:;;;;;:TU24711V211174:A:10002131X(2004)0620016208EXPERIMENTALINVESTIGATIONSONSTATICINTERFERENCEEFFECTSOFTALLBUILDINGSXieZhuangning1GuMing2NiZhenhua1(1ShantouUniversity)(2TongjiUniversity)Abstract:Thestaticinterferenceeffectoftallbuildingswithvariousheightsandbreadthsinvariousupstreamterrainsaswellasvariousspacingwasstudiedbywindtunneltestandforcebalancetechnique.Theartificialneuralnetworksmethodandsta2tisticalmethodwereusedforanalyzingandcomparingthehugeamountoftestdata.Theresultsshowthattheupstreambuild2ingsgenerallycausecertainshieldingeffectbydecreasingthewindloadonthedownstreamprincipalbuilding,butside2by2sidearrangedinterferingbuildingscouldsignificantlyenhancethewindloadontheprincipalbuildingowingtothechannelingef2fect.Generally,theshieldingeffectincreaseswiththebreadthoftheinterferingbuildings,butthechannelingeffectwillalsoincreasewiththebreadth.Theeffectofthelowerinterferingbuildingswithheightratio(Hr)lessthan015couldbeneglect2ed,andthesensitiveHrisintherangefrom015to110.TheshieldingeffectforhigherinterferingbuildingsofHr1isidenticalwiththatofHr=1,butthechannelingeffectmaybecomemoreobvious.Keywords:tallbuildings;windloads;staticinterferenceeffects;channelingeffects;windtunneltest;neuralnetwork:2002206203,:2003207216(59895410)(010455)1,,,,3;,;,13,,017,,1,,[1,2],,,,,,,(IF):376Vol137No1620046CHINACIVILENGINEERINGJOURNALJun12004©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=MyMy(1),,,,,,2STDX-1,STDX-13m2m20m,45mPs[3],BDJR3,1,1JR3UFS4515A100Table1SpecificationsofNittaUFS-4515A100sensorFxFy440NFz880NMxMyMz51Nm:012%:012%1P2000100mm100mm600mm()5(2b115b1b0175b015b)5(115h1125h1h0175h015h)(),bh1,AB,C740033111Fig11x2ycoordinategridforlocatingtheinterferingbuildings,[4],():SF=-0105+0165x+0129x2-0124x3(2)x=log[S(h+b)Phb],S,b,hBD[4](2),22IFFig12Interferencefactorsfortwotandem2arrangedbuildingsSxD(2),B,,3b6b,,2b3b4b,B3b,Saka2moto&Haniu(1988)[5](2),71376©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[6]TaniikeSaunders,[2b8b,04b],[7],,2y312b,,[7],B,,,2()Table2ComparisonoftheIFsoftwo2buildingsscheme[6][7](5b,115b)017801740173(5b,215b)019001980196(5b,4b)[3]11011031103(8b,0)015701630157(8b,115b)017401710164(5b,215b)018601930188(8b,4b)[3]019911001102[3]3123()BD,,,,,(a)(b)B(c)D3Fig13IFsfortheschemeoftwoidenticalbuildingsindifferentupstreamterrains31331311,,,,,,,,0,-012,,,DB31312,3,x,AyBy,,,,,1,IF,,111010%,,1104(3b)31313,4(4),812004©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(A)(611b,-214b),B,4,A3b:AIF014,5b6b,018IF1A0195(3b),4IF,,,IF019514A(611b,-214b)Fig14Variationsoftheinterferencefactorvs1therelativepositionsofbuildingmodelBwhilemodelAat(611b,-214b)inexposurecategoryB4,,5IF,,35%1,13%,IF019,,IF=1112%,,,,5(B)Fig15Distributionofinterferencefactorsforschemewithtwo2buildingsandtri2buildings31314ASCE7-98[8],,,,,,IF,y=312b,6AxBxABx,,BD,x0,IF111,1104,,,,,,IF,,BIF1104D314,0150175110115210,91376©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=312bFig16Interferencefactorsdistributionoftri2buildingschemeforthetwointerferingasbuildingspositedaty=312b31411,,,,IF,,,5(0,-312b),(7),,(Br=1),IF31412,,,8,,IF014,015IF019,,IF=17(0,-312b)IFFig17InfluenceofbreadthratiosontheIFfortheinterferingbuildingslocatedat(0,-312b)8IF(B)Fig18Influenceofbreadthofinterferingbuildingsoninterferencefactor(tri2buildingschemeinexposurecategoryB),,,,(0,312b)4B,IF,IF11195,,20%315,01501751101125115,31511B9,Hr=015022004©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(0,-312b),11069()Fig19Distributionofinterferencefactorsoftwo2buildingswithvariousheightratio31512,10BD,,:015h,B,0191,,D,,015h0175h1hB,IF017,,(611b,116b),(a)B(b)D10Fig110Distributionofinterferencefactorsoftri2buildingswithvariousheightratios1111(611b,116b)Fig111Interferencefactorofinterferingbuildingwithvariousheightat(611b,116b),,,,,,,11,DB10BD11,015110,12376©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=110,,DHr=115IF1113,,IF(0,116b),(0,312b)IF1110316IF,,,,,4,,,(ReducedInterferenceFactor,RIF)IFAB,ABPA(x,y)PB(x,y),:IF=f(PA,PB),PA,PB(3),:RIF=g(PA)=maxPBf(PA,PB)(4),PA,(4),RIF(4)RIF,PAPB,:IF=min(g(PA),g(PB))(5),(3),BDRIF12,3,BDRIF,BD,5%,D12RIFFig112DistributionofreducedinterferencefactorsofBasictri2buildingsscheme4,,:(1),,D;(2),IF1,,,,1120,(3),,(4)015,015(29)222004©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[4],(4),,(20%)(5),[4][1],.:-[J].,2003(5),4651[2],.[M].,1995[3]Carava