Pressure (force) from wind on a building

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Homework Help Overview

The discussion revolves around the calculation of wind pressure on a building using a specific equation that includes variables related to wind velocity and building height. The original poster seeks guidance on forming a differential equation based on these relationships.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants inquire about the meaning of constants in the equations and the nature of the forces involved. There are questions regarding the type of differential equation needed and the relationships between the variables, particularly between wind velocity and building height.

Discussion Status

Some participants have provided clarifications regarding the constants and their relevance to building codes. The original poster expresses uncertainty about the relationships between the variables and seeks further direction. Multiple interpretations of the problem are being explored without a clear consensus.

Contextual Notes

The original poster lacks specific values for wind velocity and building height, which are crucial for establishing the desired relationships. There is also mention of the context of building codes and environmental factors such as hurricane zones.

differcult
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Hello,
I am trying to work with an equation I have for force from wind on an enclosed building. The equation is two parts, consisting of Qz which relates the the gound structure to the building

qz = CONSTANT * CONSTANT * CONSTANT * CONSTANT * V^2 * CONSTANT
V being the velocity

You then have the force equation
P = Qz * CONSTANT*CONSTANT - Qh(CONSTANT)

Qh being the avg height of the building.

Could someone give me a little direction on how to for a differential equation with this?

Any help would be great!
 
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anyone please?

differcult said:
Hello,
I am trying to work with an equation I have for force from wind on an enclosed building. The equation is two parts, consisting of Qz which relates the the gound structure to the building

qz = CONSTANT * CONSTANT * CONSTANT * CONSTANT * V^2 * CONSTANT
V being the velocity

You then have the force equation
P = Qz * CONSTANT*CONSTANT - Qh(CONSTANT)

Qh being the avg height of the building.

Could someone give me a little direction on how to for a differential equation with this?

Any help would be great!
 
Hello,
I am trying to work with an equation I have for force from wind on an enclosed building. The equation is two parts, consisting of Qz which relates the the gound structure to the building

qz = CONSTANT * CONSTANT * CONSTANT * CONSTANT * V^2 * CONSTANT
V being the velocity

You then have the force equation
P = Qz * CONSTANT*CONSTANT - Qh(CONSTANT)

Qh being the avg height of the building.

Could someone give me a little direction on how to for a differential equation with this?

Any help would be great!
 
I think you'll have to be a little more clear about your equations. What do all the constants mean? Do you have an equation which describes the force on the building due to the wind? What does it depend on? What kind of force are we talking about? A distributed load?
 
The constants have to do with based one ASCE code, is it in a hurricane zone? The tilt of the building. Most of the constants are actully just a 1 since they are "normal"

P would be a distributed load over Qh
 
differcult said:
The constants have to do with based one ASCE code, is it in a hurricane zone? The tilt of the building. Most of the constants are actully just a 1 since they are "normal"

P would be a distributed load over Qh

OK, what kind of a differential equation are we talking about? What exactly are you trying to find, and what exactly is given? You know the height of the building, and the force due to the wind depending on the velocity of the wind, right? Or am I missing something?
 
I know all of the constants listed above. I do not know V or Qh,height, I was hoping to create a relationship between them.

I can solve these by themselfs just fine, but want a relationship.
 
differcult said:
I know all of the constants listed above. I do not know V or Qh,height, I was hoping to create a relationship between them.

I can solve these by themselfs just fine, but want a relationship.

A relationship between the velocity of the wind and the height of the building? I'm not sure this makes sense.
 
I guess I said that wrong,
A relationship between the pressure, from V and Qh
 

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