Gust Effect Factor as given by ASCE 7 Calculator

✖Wind Pressure is the pressure due to the wind.ⓘ Wind Pressure [p]			+10% -10%
✖Velocity Pressure at Point is the pressure due to the velocity of wind at some point.ⓘ Velocity Pressure at Point [q_i]			+10% -10%
✖Internal Pressure Coefficient refers to the pressure inside a building, perhaps due to flow past or through openings in the structure.ⓘ Internal Pressure Coefficient [GC_pt]			+10% -10%
✖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.ⓘ Velocity Pressure [q]			+10% -10%
✖The External Pressure Coefficient is the coefficient for the external pressure.ⓘ External Pressure Coefficient [C_ep]			+10% -10%

✖The Gust Response Factor is to account for fluctuations in wind speed.ⓘ Gust Effect Factor as given by ASCE 7 [G]

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Formula

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Gust Effect Factor as given by ASCE 7

Formula

G = \frac{p + q i \cdot GC pt}{q \cdot C ep}

Example

1.501579 = \frac{14.88 pdl/ft² + 15 pdl/ft² \cdot 0.91}{20 pdl/ft² \cdot 0.95}

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Gust Effect Factor as given by ASCE 7 Solution

STEP 0: Pre-Calculation Summary

Formula Used

Gust Response Factor = (Wind Pressure+Velocity Pressure at Point*Internal Pressure Coefficient)/(Velocity Pressure*External Pressure Coefficient)
G = (p+q_i*GC_pt)/(q*C_ep)
This formula uses 6 Variables

Variables Used

Gust Response Factor - The Gust Response Factor is to account for fluctuations in wind speed.
Wind Pressure - (Measured in Pascal) - Wind Pressure is the pressure due to the wind.
Velocity Pressure at Point - (Measured in Pascal) - Velocity Pressure at Point is the pressure due to the velocity of wind at some point.
Internal Pressure Coefficient - Internal Pressure Coefficient refers to the pressure inside a building, perhaps due to flow past or through openings in the structure.
Velocity Pressure - (Measured in Pascal) - 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.
External Pressure Coefficient - The External Pressure Coefficient is the coefficient for the external pressure.

STEP 1: Convert Input(s) to Base Unit

Wind Pressure: 14.88 Poundal per Square Foot --> 22.1438794801375 Pascal (Check conversion here)
Velocity Pressure at Point: 15 Poundal per Square Foot --> 22.3224591533644 Pascal (Check conversion here)
Internal Pressure Coefficient: 0.91 --> No Conversion Required
Velocity Pressure: 20 Poundal per Square Foot --> 29.7632788711526 Pascal (Check conversion here)
External Pressure Coefficient: 0.95 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

G = (p+q_i*GC_pt)/(q*C_ep) --> (22.1438794801375+22.3224591533644*0.91)/(29.7632788711526*0.95)

Evaluating ... ...

G = 1.50157894736842

STEP 3: Convert Result to Output's Unit

1.50157894736842 --> No Conversion Required

FINAL ANSWER

1.50157894736842 ≈ 1.501579 <-- Gust Response Factor

(Calculation completed in 00.004 seconds)

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Created by Mridul Sharma

Indian Institute of Information Technology (IIIT), Bhopal

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National Institute of Technology Karnataka (NITK), Surathkal

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< Wind Loads Calculators

Gust Response Factor using Wind Pressure

Go Gust Response Factor = Wind Pressure/(Velocity Pressure*Pressure Coefficient)

Pressure Coefficient using Wind Pressure

Go Pressure Coefficient = Wind Pressure/(Velocity Pressure*Gust Response Factor)

Velocity Pressure using Wind Pressure

Go Velocity Pressure = Wind Pressure/(Gust Response Factor*Pressure Coefficient)

Equivalent Static Design Wind Pressure

Go Wind Pressure = Velocity Pressure*Gust Response Factor*Pressure Coefficient

Gust Effect Factor as given by ASCE 7 Formula

Gust Response Factor = (Wind Pressure+Velocity Pressure at Point*Internal Pressure Coefficient)/(Velocity Pressure*External Pressure Coefficient)
G = (p+q_i*GC_pt)/(q*C_ep)

What is Gust Factor?

The gust response factor is a measure of the effective wind loading on a structure and is intended to translate the dynamic response phenomena due to gust loading into relatively simpler static design criteria.

How to Calculate Gust Effect Factor as given by ASCE 7?

Gust Effect Factor as given by ASCE 7 calculator uses Gust Response Factor = (Wind Pressure+Velocity Pressure at Point*Internal Pressure Coefficient)/(Velocity Pressure*External Pressure Coefficient) to calculate the Gust Response Factor, The Gust Effect Factor as given by ASCE 7 is defined as the gust effect factor which is generally considered as 0.85 for rigid structures or determined using equation 6.4, section 6.5 in ASCE 7. Gust Response Factor is denoted by G symbol.

How to calculate Gust Effect Factor as given by ASCE 7 using this online calculator? To use this online calculator for Gust Effect Factor as given by ASCE 7, enter Wind Pressure (p), Velocity Pressure at Point (q_i), Internal Pressure Coefficient (GC_pt), Velocity Pressure (q) & External Pressure Coefficient (C_ep) and hit the calculate button. Here is how the Gust Effect Factor as given by ASCE 7 calculation can be explained with given input values -> 1.493684 = (22.1438794801375+22.3224591533644*0.91)/(29.7632788711526*0.95).

FAQ

What is Gust Effect Factor as given by ASCE 7?

The Gust Effect Factor as given by ASCE 7 is defined as the gust effect factor which is generally considered as 0.85 for rigid structures or determined using equation 6.4, section 6.5 in ASCE 7 and is represented as G = (p+q_i*GC_pt)/(q*C_ep) or Gust Response Factor = (Wind Pressure+Velocity Pressure at Point*Internal Pressure Coefficient)/(Velocity Pressure*External Pressure Coefficient). Wind Pressure is the pressure due to the wind, Velocity Pressure at Point is the pressure due to the velocity of wind at some point, Internal Pressure Coefficient refers to the pressure inside a building, perhaps due to flow past or through openings in the structure, 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 & The External Pressure Coefficient is the coefficient for the external pressure.

How to calculate Gust Effect Factor as given by ASCE 7?

The Gust Effect Factor as given by ASCE 7 is defined as the gust effect factor which is generally considered as 0.85 for rigid structures or determined using equation 6.4, section 6.5 in ASCE 7 is calculated using Gust Response Factor = (Wind Pressure+Velocity Pressure at Point*Internal Pressure Coefficient)/(Velocity Pressure*External Pressure Coefficient). To calculate Gust Effect Factor as given by ASCE 7, you need Wind Pressure (p), Velocity Pressure at Point (q_i), Internal Pressure Coefficient (GC_pt), Velocity Pressure (q) & External Pressure Coefficient (C_ep). With our tool, you need to enter the respective value for Wind Pressure, Velocity Pressure at Point, Internal Pressure Coefficient, Velocity Pressure & External Pressure Coefficient and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Gust Response Factor?

In this formula, Gust Response Factor uses Wind Pressure, Velocity Pressure at Point, Internal Pressure Coefficient, Velocity Pressure & External Pressure Coefficient. We can use 1 other way(s) to calculate the same, which is/are as follows -

Gust Response Factor = Wind Pressure/(Velocity Pressure*Pressure Coefficient)

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