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Bonjour,
Comment je pourrai justifier mes calculs avec robot 2012 vis à vis mon chef, pour les valeurs des pressions de vent calculées par robot d'une part et à la main d'une autre part, c vrai que les valeurs trouvées ne sont pas aussi différentes, mais la question m'a été posé déjà! et que je connais pas comment les formules sont introduites dans robot.
Merci de me donner une petite explication pour ça (voir pièce jointe)
The objective is to make sure that the total value of load applied to a particular bar is correct. The generated load is a linearly varying one whereas the formula given in the code is not which 'force' us to make a small adjustment of the qh values at the ends of a given bar. To illustrate; imagine a vertical bar that starts at z = 0 m and ends at z= 10 m. Using the code formula:
at z = 0m qh = 2.5*60* (0+18) / (0+60) = 45
at z=5m qh = 2.5*60*(5+18) / (5 + 60) = 53.08
at z = 10m qh = 2.5*60*(10+18) / (10+60) = 60
If the change was linear then at z = 5m we should have 0.5*(45 + 60) = 52.5
as 53.08 > 52.5 then to have the same total value of load the values of qh for linearly varying load have to be slightly changed.
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Artur Kosakowski
I don't consider myself as the expert in the French climatic code but I think it is just:
delta * (Ce - Ci) * qr * bay spacing
and you can find these intermediate values in either of the calculation notes whereas the general formulas I'm sure are listed in the NV code itself
If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.
Artur Kosakowski
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