Wind Pressure Calculation Formula

Wind Pressure Formula:

\[ P = \frac{1}{2} \rho v^2 \]

Wind Pressure (P): Pa

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1. What is the Wind Pressure Calculation Formula?

Definition: This calculator computes the dynamic wind pressure based on air density and wind speed using Bernoulli's principle.

Purpose: It helps engineers, architects, and meteorologists determine wind loads for structural design and analysis.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P = \frac{1}{2} \rho v^2 \]

Where:

\( P \) — Wind pressure (Pascals)
\( \rho \) — Air density (kg/m³)
\( v \) — Wind speed (m/s)

Explanation: The wind pressure increases with the square of wind speed and linearly with air density.

3. Importance of Wind Pressure Calculation

Details: Accurate wind pressure estimation is crucial for designing buildings, bridges, and other structures to withstand wind loads safely.

4. Using the Calculator

Tips: Enter air density (default 1.225 kg/m³ at sea level) and wind speed in m/s. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is standard air density?
A: At sea level and 15°C, it's approximately 1.225 kg/m³. Decreases with altitude and increases with humidity.

Q2: How does wind speed affect pressure?
A: Pressure increases with the square of wind speed - doubling wind speed quadruples the pressure.

Q3: What units should I use?
A: Use kg/m³ for density and m/s for velocity to get Pascals (Pa) as the result.

Q4: Is this the total wind load on a structure?
A: No, this is dynamic pressure. Total load depends on shape coefficients and surface area.

Q5: How does altitude affect the calculation?
A: Higher altitudes have lower air density, resulting in lower wind pressure for the same wind speed.