例1 一隐框幕墙工程,WK= 1.5KN/m2,设计地震基本加速度0.15g,分格(a×b)1.2m×1.5m,单层玻璃厚15mm,框——筒结构,采用白云单组份硅酮结构密封胶,求胶缝宽度和厚度。
解:GK=25.6×0.015=0.384KN/m2 qG=1.2×0.384=0.461KN/m2
qEK=5×0.12×0.384=0.23K N/m2 qE=1.3×0.23=0.299 KN/m2
W=1.4 ×1.5=2.1KN/m2 q +0.2W=0.299+0.2×2.1=0.299+0.420=0.719 KN/m2
CS-1= Wa/2000f1=2.1×1200/(2000×0.2)=6.3≈7mm
CS-2=( q +0.2W)a/2000f1=0.719×1200/(2000×0.2)=2.157≈3mm
CS-3= qG ab/2000(a+b)f2=0.461×1200×1500/[2000×(1200+1500)×0.01]=15.37≈16mm
uS=η[φ]hg=0.6×1/267×1500=3.37 mm
TS= uS/3δ=1.125/(3×0.12)=3.125≈4 mm
采用CS-=16mm,TS=8 mm
例2 一隐框幕墙工程,WK= 2.25KN/m2,设计地震基本加速度0.15g,分格(a×b)1.2m×1.5m,夹层玻璃(12+12)mm,框——筒结构,采用白云单组份硅酮结构密封胶,求胶缝宽度和厚度。
解:GK=25.6×0.024=0.614KN/m2 qG=1.2×0.614=0.737KN/m2
qEK=5×0.12×0.614=0.368K N/m2 qE=1.3×0.368=0.478 KN/m2
W=1.4 ×2.25=3.15KN/m2 q +0.2W=0.478+0.2×3.15=0.478+0.630=1.11 KN/m2
CS-1= Wa/2000f1=3.15×1200/(2000×0.2)=9.45≈10mm
CS-2=( q +0.2W)a/2000f1=1.11×1200/(2000×0.2)=3.33≈4mm
CS-3= qG ab/2000(a+b)f2=0.737×1200×1500/[2000×(1200+1500)×0.01]=24.57≈25mm
uS=η[φ]hg=0.6×1/800×1500=1.125 mm
TS= uS/3δ=1.125/(3×0.12)=3.125≈4 mm
采用CS-=25mm,TS=12.5 mm
例3 一隐框幕墙工程,WK= 2.75KN/m2,设计地震基本加速度0.15g,分格(a×b)1.2m×1.5m,中空玻璃(12+9+12)mm,框——筒结构,采用白云单组份硅酮结构密封胶,求胶缝宽度和厚度。
解:GK=25.6×0.024=0.614KN/m2 qG=1.2×0.614=0.737KN/m2
qEK=5×0.12×0.614=0.368K N/m2 qE=1.3×0.368=0.478 KN/m2
W=1.4 ×2.75=3.85KN/m2 q +0.2W=0.478+0.2×3.85=0.478+0.770=1.248 KN/m2
CS-1= Wa/2000f1=3.85×1200/(2000×0.2)=11.55≈12mm
CS-2=( q +0.2W)a/2000f1=1.248×1200/(2000×0.2)=3.744≈4mm
CS-3= qG ab/2000(a+b)f2=0.737×1200×1500/[2000×(1200+1500)×0.01]=24.57≈25mm
uS=η[φ]hg=0.6×1/800×1500=1.125 mm
TS= uS/3δ=1.125/(3×0.12)=3.125≈4 mm
采用CS-=25mm,TS=12.5 mm
中空玻璃二道密封胶胶缝宽度
外片玻璃GK=25.6×0.012=0.307KN/m2 qG=1.2×0.307=0.368KN/m2
qEK=5×0.12×0.368=0.221K N/m2 qE=1.3×0.221=0.287 KN/m2
W=1.4 ×2.75=3.85KN/m2 q +0.2W=0.287+0.2×3.85=0.287+0.770=1.057 KN/m2
CS-1= Wa/2000f1=3.85×1200/(2000×0.2)=11.55≈12mm
CS-2=( q +0.2W)a/2000f1=1.057×1200/(2000×0.2)=3.171≈4mm
CS-3= qG ab/2000(a+b)f2=0.368×1200×1500/[2000×(1200+1500)×0.01]=12.27≈13mm
中空玻璃二道密封胶胶缝宽度采用 CS=13mm,TS=7 mm