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Wind Directionality Factor given Velocity Pressure Formula

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Wind Directionality Factor reflects the fact that the climatologically and aerodynamically or dynamically most unfavourable wind directions typically do not coincide. Check FAQs

K d = \frac{q}{0.00256 \cdot K z \cdot K zt \cdot I \cdot {V B}^{2}}

K_d - Wind Directionality Factor?q - Velocity Pressure?K_z - Velocity Exposure Coefficient?K_zt - Topographic Factor?I - Importance Factor for End Use?V_B - Basic Wind Speed?

Wind Directionality Factor given Velocity Pressure Example

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Here is how the Wind Directionality Factor given Velocity Pressure equation looks like with Values.

Here is how the Wind Directionality Factor given Velocity Pressure equation looks like with Units.

Here is how the Wind Directionality Factor given Velocity Pressure equation looks like.

0.78 = \frac{20}{0.00256 \cdot 0.85 \cdot 25 \cdot 0.8 \cdot {29.6107}^{2}}

0.78 = \frac{20pdl/ft²}{0.00256 \cdot 0.85 \cdot 25 \cdot 0.8 \cdot {29.6107m/s}^{2}}

0.78 = \frac{20}{0.00256 \cdot 0.85 \cdot 25 \cdot 0.8 \cdot {29.6107}^{2}}

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Wind Directionality Factor given Velocity Pressure Solution

Follow our step by step solution on how to calculate Wind Directionality Factor given Velocity Pressure?

FIRST Step Consider the formula

K d = \frac{q}{0.00256 \cdot K z \cdot K zt \cdot I \cdot {V B}^{2}}

Next Step Substitute values of Variables

∴

K d = \frac{20pdl/ft²}{0.00256 \cdot 0.85 \cdot 25 \cdot 0.8 \cdot {29.6107m/s}^{2}}

Next Step Convert Units

∴

K d = \frac{29.7633Pa}{0.00256 \cdot 0.85 \cdot 25 \cdot 0.8 \cdot {29.6107m/s}^{2}}

Next Step Prepare to Evaluate

∴

K d = \frac{29.7633}{0.00256 \cdot 0.85 \cdot 25 \cdot 0.8 \cdot {29.6107}^{2}}

Next Step Evaluate

∴

K d = 0.779999884371908

LAST Step Rounding Answer

∴

K d = 0.78

Wind Directionality Factor given Velocity Pressure Formula Elements

Variables

Wind Directionality Factor

Wind Directionality Factor reflects the fact that the climatologically and aerodynamically or dynamically most unfavourable wind directions typically do not coincide.

Symbol: K_d

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Wind Directionality Factor

Velocity Pressure

Velocity Pressure is the pressure required to accelerate air from zero velocity to some velocity and is proportional to the kinetic energy of the air stream.

Symbol: q

Measurement: PressureUnit: pdl/ft²

Note: Value should be greater than 0.

Formulas to find Velocity Pressure

Velocity Exposure Coefficient

Velocity Exposure Coefficient is evaluated at some height z.

Symbol: K_z

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Velocity Exposure Coefficient

Topographic Factor

Topographic Factor are also called indirect factors as they influence the growth and development of organisms by bringing variations in climatic factors.

Symbol: K_zt

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Topographic Factor

Importance Factor for End Use

Importance Factor for End Use is the factor whose value lies in range 0.8 to 1.2.

Symbol: I

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Importance Factor for End Use

Basic Wind Speed

Basic Wind Speed is the wind speed corresponding to a 3-s gust speed at 33 ft above the ground in Exposure C.

Symbol: V_B

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Basic Wind Speed

Other formulas in Wind Loads category

Go Equivalent Static Design Wind Pressure

p = q \cdot G \cdot C p

Go Velocity Pressure using Wind Pressure

q = \frac{p}{G \cdot C p}

Go Gust Response Factor using Wind Pressure

G = \frac{p}{q \cdot C p}

Go Pressure Coefficient using Wind Pressure

C p = \frac{p}{q \cdot G}

How to Evaluate Wind Directionality Factor given Velocity Pressure?

Wind Directionality Factor given Velocity Pressure evaluator uses Wind Directionality Factor = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Importance Factor for End Use*Basic Wind Speed^2) to evaluate the Wind Directionality Factor, The Wind Directionality Factor given Velocity Pressure is defined as the load reduction factor intended to take into account the less than 100% probability that the design event wind direction aligns with the worst case building aerodynamics. Wind Directionality Factor is denoted by K_d symbol.

How to evaluate Wind Directionality Factor given Velocity Pressure using this online evaluator? To use this online evaluator for Wind Directionality Factor given Velocity Pressure, enter Velocity Pressure (q), Velocity Exposure Coefficient (K_z), Topographic Factor (K_zt), Importance Factor for End Use (I) & Basic Wind Speed (V_B) and hit the calculate button.

FAQs on Wind Directionality Factor given Velocity Pressure

What is the formula to find Wind Directionality Factor given Velocity Pressure?

The formula of Wind Directionality Factor given Velocity Pressure is expressed as Wind Directionality Factor = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Importance Factor for End Use*Basic Wind Speed^2). Here is an example- 0.387698 = 29.7632788711526/(0.00256*0.85*25*0.8*29.6107^2).

How to calculate Wind Directionality Factor given Velocity Pressure?

With Velocity Pressure (q), Velocity Exposure Coefficient (K_z), Topographic Factor (K_zt), Importance Factor for End Use (I) & Basic Wind Speed (V_B) we can find Wind Directionality Factor given Velocity Pressure using the formula - Wind Directionality Factor = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Importance Factor for End Use*Basic Wind Speed^2).

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Wind Directionality Factor given Velocity Pressure Formula

Wind Directionality Factor given Velocity Pressure Example

Wind Directionality Factor given Velocity Pressure Solution

Wind Directionality Factor given Velocity Pressure Formula Elements

Other formulas in Wind Loads category

How to Evaluate Wind Directionality Factor given Velocity Pressure?

FAQs on Wind Directionality Factor given Velocity Pressure

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