The action of the wind is directly proportional to its dynamic pressure qp, which depends on the square of the wind velocity, the roughness and the shape of the ground, as well as the height above the ground on which it is calculated. Wind forces on a surface can be calculated as global (punctual) or as local (distributed) forces. For this, the peak dynamic pressure qp is multiplied by a force coefficient (punctual) or by a net pressure coefficient (canopy roofs or free-standing walls) or by internal and external pressure coefficients (closed or permeable buildings).

Calculation of the peak velocity pressure

Calculation of wind actions