Performance assessment of the window-wall interface. PhD-meeting Nathan Van Den Bossche - 04/06/2010 Department of Architecture Ghent University
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1 Prformanc assssmnt of th wndow-wall ntrfac Start: 04/2007 Stop: 01/2012 Nathan Van Dn Bossch Suprvsor: Arnold Janssns Hstory of Enrgy cods n Flandrs: 1992: Vntlaton and nsulaton dcr nsulaton lvl K : Vntlaton and nsulaton dcr nsulaton lvl K : EPB mandatory lvl E : EPB mandatory lvl E80 + thrmal brdgs 2016: zro nrgy us n publc buldngs? Passd n Europan parlamnt Prformanc assssmnt of th wndow-wall ntrfac 2019: zro nrgy us n prvat buldngs? Passd n Europan parlamnt? / / Enrgy cods & standards n 1999 (sourc: Lawrnc Brkly Laboratory) Tradtonal BFG/HVAC-mtng EIFS (US, Grmany) Nathan Van Dn Bossch Wood-fram - 27/10/2009 (US, Scandnava) Dpartmnt Vacuum of Archtctur mat., Arogl, 1
2 Prformanc assssmnt Rqurmnts on th buldng nvlop Safty, structural ngnrng Watrtghtnss Artghtnss Thrmal prformanc Fr safty Mantnanc wndows wndow-wall ntrfac Wndow-wall ntrfac 1. Clmatc data 4. Modl PE 5. Watrtghtnss 2. Mchancal prformanc 3. Artghtnss 2
3 Wndow fram 1. Clmatc data 4. Modl PE 2. Mchancal prformanc 3. Artghtnss 5. Watrtghtnss Modl prssur qualsaton dm = ρq ρq dt Q m 0 Q mr' T PV = nrt P = wth R' = V n m R dpc R' T = ρ dt V n n [ C A P Pc sgn( P Pc ) C A Pc P sgn( Pc P )] Q = C A ( P P ) c n wth P P' =, P ' 0 AC P0 α =, n n A C P + AC P 0 n 0 ρr' T AC P0 + AC P0 t' = t V P n 0 n Q = C A ( P P ) ( P0 + Pwnd (1) ). V0 m0 = R' T c n dpc ' n n = α P ' Pc ' sgn( P ' Pc ') (1 α ) Pc ' P ' sgn( Pc ' P ') dt' 3
4 Q Modl watrtghtnss? m 0 Q Modl watr nfltraton at dffrnt prssurs dranag capacty (hydrostatc watr column) watr buffrng (lmt thrshold valu) kntc nrgy Q = C A ( P P ) Q = C A ( P P ) c c n n ( P0 + Pwnd (1) ). V0 m0 = R' T Boundary condtons xtror prssurs xtror ran dposton rats ntracton watr prssur qualsaton tm-dpndnt bhavour of gaskts occluson Modl watrtghtnss? 1. Clmatc data 4. Modl PE 2. Mchancal prformanc 3. Artghtnss 5. Watrtghtnss 4
5 Modl watrtghtnss? 1. Clmatc data 4. Modl PE 2. Mchancal prformanc 3. Artghtnss 5. Watrtghtnss Watrtghtnss: tst mthodology Prssur dffrnc [Pa] Tm [mn] 5
6 Modl watrtghtnss? 1. Clmatc data 4. Modl PE 2. Mchancal prformanc 3. Artghtnss 5. Watrtghtnss Wnd loads on buldngs Eurocod 1 part1.4 Prssur dstrbuton Glass thcknss Evry numbr: a dffrnc of 1mm rqurd glass thcknss. Corrct calculaton: av. 12% rducton for hgh-rs 6
7 Wnd loads on IGU PE prssur mchancs volum PE Bndng of glass supportd by 4 dgs calculatd wth FEM (powrplat) Wnd loads on wndow frams Basc assumptons Smplfd calculaton mthods 7
8 Wnd loads on wndow fastnrs 1 Fastnng of wndow frams 2 Calculaton mthodology 3 4 Modl watrtghtnss? 1. Clmatc data 4. Modl PE 2. Mchancal prformanc 3. Artghtnss 5. Watrtghtnss 8
9 Artghtnss of wndow frams (survy on 207 wndows) 35 Dstrbuton [%] Lvl of artghtnss 3 ( EN 12207) Lvl of artghtnss 4 ( EN 12207) Lvl of watrtghtnss - EN [Pa] Artghtnss of wndow frams Artghtnss rcommndatons Watr 150Pa Ar lvl 3 Watr 450Pa Ar lvl 4 Watr 900Pa Ar 0.5* lvl 4 ar lakag pr mtr jont lngth [m³/h.m] Artghtnss lvl 3 Artghtnss lvl Prssur dffrnc [Pa] 9
10 Artghtnss of wndow-wall ntrfac Modl watrtghtnss? 1. Clmatc data 4. Modl PE 2. Mchancal prformanc 3. Artghtnss 5. Watrtghtnss 10
11 Modl watrtghtnss? 1. Clmatc data 4. Modl PE 2. Mchancal prformanc 3. Artghtnss 5. Watrtghtnss Watrtghtnss of WWI: mmbrans 11
12 Watrtghtnss of WWI: mmbrans Watrtghtnss of WWI: mmbrans 12
13 Watrtghtnss of wndow frams Prssur dffrnc at momnt of falur accordng to EN stay vnt closng pont Wp hols Wp hols Wp hol 2 vnts 1 vnt 0 vnts 0 Wp hols 2 vnts 1 vnt 0 vnts 0 Wp hols Wp hol Wp hols Wp hols wp hol prssur tap Watrtghtnss of wndow frams % % Prssur dffrnc [Pa] Outsd Rght Jamb 80% 60% 40% PEP [%] 100 Lft Jamb PEP 20% 0 0% Tm [s] 13
14 Watrtghtnss of wndow frams Lab tsts: wndow frams (watr vacuaton) cavty prssur 597 Pa 414 Pa Modl watrtghtnss? 1. Clmatc data 4. Modl PE 2. Mchancal prformanc 3. Artghtnss 5. Watrtghtnss 14
15 Watr nfltraton Watr nfltraton 15
16 Watr nfltraton Watr nfltraton 16
17 Watr nfltraton Watr nfltraton Frquncy 1s 1 Hz 3s 0.33 Hz 5s 0.2 Hz 10s 0.1 Hz 17
18 Watr nfltraton Ampltud Pa = 1.20* Pm Pa = 1.33* Pm Pa = 1.50* Pm Pa = 1.80* Pm Watr nfltraton (1±0.2)*P (1±0.33)*P (1±0.5)*P (1±0.8)*P Damtr: 4mm P: 400Pa Back plat closd 18
19 Modl watrtghtnss? Q m 0 Q Modl watr nfltraton at dffrnt prssurs dranag capacty (hydrostatc watr column) watr buffrng (lmt thrshold valu) Q = C A ( P P ) Q = C A ( P P ) c c n n ( P0 + Pwnd (1) ). V0 m0 = R' T Boundary condtons xtror prssurs xtror ran dposton rats ntracton watr prssur qualsaton tm-dpndnt bhavour of gaskts Modl watrtghtnss? Q m 0 Q Modl watr nfltraton at dffrnt prssurs dranag capacty (hydrostatc watr column) watr buffrng (lmt thrshold valu) Q = C A ( P P ) Q = C A ( P P ) c c n n ( P0 + Pwnd (1) ). V0 m0 = R' T Boundary condtons xtror prssurs xtror ran dposton rats ntracton watr prssur qualsaton tm-dpndnt bhavour of gaskts 19
20 Modl watrtghtnss? Q m 0 Q Modl watr nfltraton at dffrnt prssurs dranag capacty (hydrostatc watr column) watr buffrng (lmt thrshold valu) Q = C A ( P P ) Q = C A ( P P ) c c n n ( P0 + Pwnd (1) ). V0 m0 = R' T Boundary condtons xtror prssurs xtror ran dposton rats ntracton watr prssur qualsaton tm-dpndnt bhavour of gaskts Dscusson: scop of th PhD? Smulaton modl Intracton of basc concpts and gudlns for archtcts and ndustry Includ gudlns on hat loss and condnsaton rsk for wndow frams and th wndow-wall ntrfac? 20
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