搜索
WINDLOADING:AS/NZS1170.2:20021.ProjectDescription&DefinitionProject:BuildingDescription:VR=Regionalwindspeedsforalldirectionsbasedon3secondgustwinddataR=averagerecurrenceinterval,inverseoftheannualprobabilityofexceedaanceMd=WinddirectionMultiplierMz,cat=Terrain/HeightmultiplierMs=ShieldingMultiplierMt=TopographicMultiplierVsit,b=Sitewindspeedsdefinedforthe8cardinaldirections(b)p=DesignWindPressuresinPaCfig=aerodynamicshapefactorCdyn=dynamicresponsefactor2.RegionalWindSpeeds(VR)AveragerecurrenceintervalR=500yearsFromTable3.1,RegionalWindSpeedVR=45m/s2.WindDirectionMultiplierLocation:CentralMelbourneRegion:A5CardinaldirectionsMdSeeTable3.2N1.00NE1.00E1.00SE1.00S1.00SW1.00W1.00NW1.00Anydirection1.00Note:1.ForregionB,C,D,Mdforalldirectionis0.95forstabilityandmainframeand1.0forothercasesincludingcladding2.ForregionCandD,includeadditionalfactorFcandFD,seeitem3.44.Terrain/HeightMultiplier(Mz,cat)TerrainCategory:2.5(seenotebelow)Heightz=8.6mTerrain/HeightMultiplierMz,cat=0.9348SeeTable4.1Note:Category1:Exposedopenterrainwithfewornoobstruction/watersurfacesCategory2:Openterrain,grasslandwithfew,wellscatteredobstructionhavingheightbetween1.5mto10mCategory3:Terrainwithnumerouscloselyspacedobstruction3-5mhighsuchasareasofsuburbanhousingCategory4:Terrainwithnumberouslarge,high(10-30mhigh)&closelyspacedobstrution,aslargecitycenter,welldev.Industrycomplex.5.ShieldingMultiplier(Ms)Averageroofheightofshieldingbuildingshs=5mAveragebreadthofshiedlingbuildingnormaltowindstreambs=100mAverageroofheightabovegroundofthestructbeingshieldedh=8.6m2020/5/1015:4011589122592108DesignWindPressureNumberofupwindshiedlingbuildingwithn45degsectorandradiusof20h=172mwithhs=hns=5Averagespacingofshieldingbuildingsls=h[10/ns+5]=60.2mShieldingParameters=ls/V(hs.bs)=2.7RefertoTable4.3,ShieldingMultiplierMs=15.TopographicMultiplier(Mt)MtisthelargerofMhandMlee,seesection4.4Mt=1.06.SiteWindSpeedVsit,b=VR.Md(Mz,cat.Ms.Mt)CardinaldirectionsMdVR.MdMsMtAve.height(z)CategoryMz,catVsit,bm/sN1.0045.001.001.008.62.50.934842.07NE1.0045.001.001.008.62.50.934842.07E1.0045.001.001.008.62.50.934842.07SE1.0045.001.001.008.62.50.934842.07S1.0045.001.001.008.62.50.934842.07SW1.0045.001.001.008.62.50.934842.07W1.0045.001.001.008.62.50.934842.07NW1.0045.001.001.008.62.50.934842.07Anydir.1.0045.001.001.008.62.50.934842.077.DesignWindPressure(witoutCfigandCdyn)p=(0.5rair)[Vdes,q]2CardinaldirectionsVdes,qm/sN-SVdes,qm/sNEpukPaN-SpukPaNEN42.071.06NE42.071.06E42.071.06SE42.071.06S42.071.06SW42.071.06W42.071.06NW42.071.06Anydir.42.0742.071.061.06UseDesignWindpressureofpu=1.06kPaForNORTHDirectionUseDesignWindpressureofpu=1.06kPaForEASTDirectionUseDesignWindpressureofpu=1.06kPaForSOUTHDirection2020/5/1015:4021589122592108DesignWindPressureDESIGNWINDLOADINGFORFRAMEANALYSIS:AS/NZS1170.2:20021.ProjectDescription&DefinitionProject:0BuildingDescription:0W-EdirectionPositivevalueofCfigindicatespressureactingtowardsthesurface.Negativevalueactingawayfromthesurface.Cfig=Cp,e.Ka.Kc.Kl.KpforexternalpressureCfig=Cp,i.KcforinternalpressureCfig=arerodynamicshapefactorCp,e=externalpressurecoefficientKa=areareductionfactor,onlyforroofandsidewall.OthersKa=1.0,includingWandLKc=combinationfactor,actingon2ormoresurfacessimultenously.Notappliedforcladding&purlins.Onlyformajorstructuralelements,suchasframe.Kl=localpressurefactor,takenKl=1.0,exceptforcladding,fixings,memberssupportcladdingfortypicalframeanalysis,Kl=1.0Kp=porouscladdingreductionfactor.Shallbetaken1.0exceptthereispermeablecladding.Cp,i=internalpressurecoefficientCf=frictionaldragforcecoefficientCdyn=dynamicresponsefactor2.DesignWindPressurewithoutCfigandCdynDesignWindpressurepu=1.06kPaused3.BuildingGeometryBuildingwidthperpendiculartowinddirectionb=58.80mBuildingdepthalongtowinddirectiond=45.00mAverageheighth=8.60mRoofslopea=3.00degreeFrameSpacingS=8.40md/b=0.765h/d=0.1914.CrossWind-MultiplierSet1(CW1)Qult=pu.(Cp,e-Cp,I).Ka.Kc.Kl.Kp.SBut,KaxKc0.8puCp,eCp,IAreaKaKcQultWskPam2kN/mkN/mWindwardWallW1.0620.70-0.814.993.33LeewardWallL1.062-0.50-0.81-3.57-2.38RoofR,UorD0-1h1.062-0.90-0.81-6.42-4.281h-2h1.062-0.50-0.81-3.57-2.382h-3h1.062-0.30-0.81-2.14-1.433h1.062-0.20-0.81-1.43-0.955.CrossWind-MultiplierSet2(CW2)Qult=pu.(Cp,e-Cp,I).Ka.Kc.Kl.Kp.SBut,KaxKc0.8puCp,eCp,IAreaKaKcQultWskPam2kN/mkN/mWindwardWallW1.06200-10.80.000.00LeewardWallL1.06200-10.80.000.00RoofR,UorD0-1h1.06200-10.80.000.001h-2h1.06200-10.80.000.002h-3h1.06200-10.80.000.003h1.06200-10.80.000.006.SideWallQult=pu.(Cp,e-Cp,I).Ka.Kc.Kl.Kp.SBut,KaxKc0.8puCp,eCp,IAreaKaKcQultWskPam2kN/mkN/mRoofR,UorD0-1h1.062-0.650-10.8-4.64-3.091h-2h1.062-0.50-10.8-3.57-2.382h-3h1.062-0.30-10.8-2.14-1.433h1.062-0.20-10.8-1.43-0.952020/5/1015:4031589122592108FrameLoadPURLINDESIGN:AS/NZS1170.2:20021.ProjectDescription&DefinitionProject:0BuildingDescription:0Cp,e=externalpressurecoefficientCp,i=internalpressurecoefficientKa=areareductionfactor,onlyforroofandsidewall.SeeTable5.4Kc=combinationfactor,actingon2ormoresurfacessimultenously.Notappliedforcladding&purlins.Onlyformajorstructuralelemen