风工程中地貌分类与地面粗糙度指数的研究与应用

[]1002-8528(2000)06-0015-03(,200092)[],,,,[];;[]TU312+11[]AAnalysisandApplicationofWindExposureCategoriesandGroundRoughnessExponentsinWindEngineeringZHANGXiang2ting(DepartmentofEngineeringMechanicsandTechnology,TongjiUniversity,Shanghai200092,China)[Abstract]Windloadisamaindesignloadforbuildingstructures.DuetorapiddevelopmentofconstructioninChina,someclausesofBuildingLoadingCodeGBJ9287arenotsuitableforengineeringapplication.InthisPaper,analysisforwindexposurecate2goriesandrelativegroundroughnessexponentshasbeengivenonthebasisoftheprincipleofwindenergydissipationpresentedbytheauthor.ThisstudymaybeanimportantreferenceforrevisionofBuildingLoadingCodeGBJ9287.[Keywords]windload;exposure;groundroughnessexponent[]2000-09-091,,1980GBJ9-87,,,,,,,GBJ9-87,,,,,,,,,,,,;,,,,2,,d166Vol.16,No.6200012BUILDINGSCIENCEDec.20001,1a,210m;1b1c,,702,8480TJ-1,118m,112m,100mm100mm,800mm,1:240,24m24m192m3Hz,Rv=vtop/1B114421894133(vtop,1,B)217151448115m/s(018m)(1146m),11101369m/s,1884,103641,,,[3],,A1G1DavenportECCST12,,1,,(2),,[5,6],1,,,,,:(z,r,)=HT0/2-/2d1012[v2gh(z,r,)]rdrddz12v2ghHTd2l21(z)2(r)3()(1)2ECCS[45],,:1(z)=1-(z/HT)2(2)2(r)=1-exp[5(r-dl)/dl](3)3()=1-exp[10(||-2)](4),;;HT;vgh;dl,,,500600m;,r,,;r,,dldl,ASCE7-937-95,1500(0145701805km)10(150m,115km);BS6399,0111km;2101107-8530h,2km;ECCST12,5km;2km,,,:=ni=1AiAa(i)b(ri,i)(5)a(i)=HTiHTmax1-12i+1(6)b(ri,i)=2(ri)3(i),A;Aii;HTmax,=0140500m;HTii,;ii,3(6116,),,;,,,GBJ50009:(1)2km,(2)h:h18m,D(D=0130,HTD=450m);9mh18m,C(C=0122,HTC=400m);h9m,B(B=0116,HTB=350m);A(A=0112,HTA=300m)(3),,,,,,(4),i,ihi,33ih(m),()(4)1015km015km,(,r)40105,(71202)/(132)=01554;,01544,0101,118%,1()0112011401160118012001220124012601280130013201340136()010800114201169011940121901245012670129101314013380135901381014020104401077010920110601119011330114501158011710118401195012070121944,1994,2km,,(4)4,:=1/26{01402(0185+0145+0170+0120+0140)+01359[2(0190+0195+0160+0185)+(0185+0145+0170+0120)+(0160+0140+0115+0115)]+01314(0160+0140+0115+0115+0140)}=01200401544,1/11018,01197;1=01301986,=012819861994,0128,01325A=0112B=0.16C=0122D=0130,BC,C,B,wZA=1139kN/m2,wZB=1131=0120,wZa=112,wZB=1131,8%,21,(21)716:3,,:(1),,,Taylor-Lee,,,(9)(2)(013),,,(3)(013),,(4),,,(),,,,,SB=1+215tg1,AC,,,Sz=S(1-z/215h),71212(71111),B,215GBJ50009:B=1+tg(1-z215H)2(10),,,(10),312,114[][1]()1977[M].[2]CodeofPracticeonWindEffectsHongKong21983,BuildingDevel2opmentDepartment[S].HongKong.[3]BritishStandardofPractice,CP3.CodeofBasicdateforDesignofbuildings:ChapterV.Loading:Part2.WindLoads[S].1972(14).[4]AustralianStandard(1989)[S].SAALoadingCode.Part2:WindLoads,StandardAssociationofAustralia,NorthSydney.[5]EuropeanPrestandardENV1991-2-4(1995).Eurocode1:Basisofdesignandactionsonstructures2Part2-4:Actionsonstructures2Windaction.Englishversion,CEN(EuropeanCommit2teeforStandardization)[S].[6]InstituteforResearchinConstruction.NRC2CNRCUserpsGuide2NBC1995StructuralCommentaries(Part4)1995[S].[7]H.Liu,(1991).WindEngineering:AHandbookforStructuralEngineers[M].Prentice2HallInc.,NewJersey.[8]ECCSTechnicalCommitteeT12:WindEffects,(1975)Recom2mendationsfortheCalculationofWindEffectsonBuildingsandStructures[M].(14).[9].[J].,19971(13)54-61.[10].[R]1.(1991).(17),,,[][1],GBJ9-87[S].,1989[2],GBJ50009-2000()[S].[3].[M].:,1998.[4].[J].,No13,1996.[5]..[J].Vol125,No.2,PP161-165,1997.[6].[A].,[C].:,1990,PP109-116.[7]KwokKCS.InterferenceeffectsontallbuildingsIn:SunTF,ed.RecentAdvancesinWindEngineering[M].Beijing:InternationalAcademicPublishers,1989,PP446-453.[8]SimiuE.,ScanlanR.H..WindEffectsonStructures[M].1985.[9],,1992[S].[10],,BS,6399,1984[S].[11],,2.01.07-85.1985[S].[12],(ECCS),1970[S].126: