The foundation of the calculation is the basic wind velocity, usually found in your region's National Annex. : vb,0v sub b comma 0 end-sub
| | Value | | --- | --- | | Location | London, UK | | Terrain | Urban | | Building height | 20 m | | Shape and size | Rectangular, 5 m x 3 m |
kr=0.19⋅(z0z0,II)0.07k sub r equals 0.19 center dot open paren the fraction with numerator z sub 0 and denominator z sub 0 comma cap I cap I end-sub end-fraction close paren to the 0.07 power wind load calculation excel sheet eurocode
(Structural Factor): Accounts for the lack of correlation of wind pressures over the surface ( ) and the dynamic vibrations caused by turbulence (
Fw=cs⋅cd⋅∑(we⋅Aref)+∑Ffrcap F sub w equals c sub s center dot c sub d center dot sum of open paren w sub e center dot cap A sub r e f end-sub close paren plus sum of cap F sub f r end-sub (Where cscdc sub s c sub d The foundation of the calculation is the basic
cr(z)=kr⋅ln(zz0)forzmin≤z≤zmaxc sub r open paren z close paren equals k sub r center dot l n open paren the fraction with numerator z and denominator z sub 0 end-fraction close paren space for space z sub m i n end-sub is less than or equal to z is less than or equal to z sub m a x end-sub
For calculating wind loads according to Eurocode 1 (EN 1991-1-4) National Annex Customization
) acting on the global structure or an isolated element is calculated as:
: Zones A, B, and C (suction zones on side walls), Zone D (windward pressure), and Zone E (leeward suction). Flat or Pitched Roofs : Zones F, G, H, and I. National Annex Customization