Peak Velocity Pressure

Notation

c_e(z) = Exposure factor
I_v(z) = Turbulence intensity
v_b = Basic wind velocity
v_m(z) = The mean wind velocity
q_b = Basic velocity pressure
q_p(z) = Peak velocity pressure
ρ = Air density

The peak velocity pressure q_p(z) at height z, is calculated using equation below.

The National Annex may give rules for the determination of q_p(z).

Air density, ρ may be given in the National Annex. The recommended value is 1,25 kg/m³.

Exposure factor c_e(z) is defined equation given below.

Basic velocity pressure q_b is defined equation below.

For c_o =1,0 and k_I =1.0 illustrations of exposure factor c_e(z) is defined in EN 1991-1-4 Figure 4.2.

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