Zone | F | G | H | I |
---|---|---|---|---|
Lengte (x) | 1.8m | 1.8m | 7.2m | 21m |
Breedte (y) | 4.5m | 9m | 18m | 18m |
Oppervlak | 8.1m² | 16.2m² | 129.6m² | 378m² |
Winddruk | -2.94kN/m² | -1.89kN/m² | -1.11kN/m² | 0.32/-0.32kN/m² |
Zone | F | G | H | I |
---|---|---|---|---|
Breedte (x) | 2m | 2m | 8m | 8m |
Lengte (y) | 5m | 20m | 30m | 30m |
Oppervlak | 10m² | 40m² | 240m² | 240m² |
Winddruk | -2.84kN/m² | -1.89kN/m² | -1.11kN/m² | 0.32/-0.32kN/m² |
Uitgaande van punt in het midden
Berekening vb: (uitdrukking 4.1 Eurocode 1991-1-4)
$ v_{b} = C_{dir} C_{season} \cdot v_{b,o} = 1\cdot1\cdot29.5=29.5$
Berekening kr: (uitdrukking 4.5 Eurocode 1991-1-4)
$ k_{r} = 0,19{{\left( \frac{{{z}_{0}}}{{{z}_{0,II}}} \right)}^{0,07}} = 0,19{{\left( \frac{{0.01}}{{0.05}} \right)}^{0,07}} = 0.16$
Berekening cr: (uitdrukking 4.4 Eurocode 1991-1-4)
$ c_{r}=k_{r} \cdot \ln \left( \frac{z}{z_{0}} \right)= 0.16 \cdot \ln \left( \frac{10}{0.01} \right)=1.23 $
Berekening vm: (uitdrukking 4.3 Eurocode 1991-1-4)
$ v_{m} \left( z = 10 \right) = c_{r} \left( z \right) \cdot c_{o} \left( z \right) \cdot v_{b} = 1.23 \cdot 1 \cdot 29.5 = 36.26 $
Berekening Iv: (uitdrukking 4.7 Eurocode 1991-1-4)
$ I_{v} \left( z = 10 \right) = \frac{k_{I}}{c_{o} \left( z \right) \cdot \ln \left( z / z_{0} \right) } = \frac{1}{1 \cdot \ln \left( 10/0.01 \right) } = 0.13 $
Berekening qp op hoogte z: (uitdrukking 4.8 Eurocode 1991-1-4)
$ q_{p} \left( z = 10 \right) = \left( 1 + 7 \cdot I_{v} \left( z \right) \right) \cdot {\scriptstyle^{1}/_{2}} \cdot \rho \cdot v_{m}^{2} \left( z = 10 \right) = \left( 1 + 7 \cdot 0.13 \right) \cdot {\scriptstyle^{1}/_{2}} \cdot 1.25 \cdot 36.26 ^{2}= 1.58 $