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RE:Shear Flow AISC 13th Ed.
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 Subject: RE:Shear Flow AISC 13th Ed.
 From: "Jeremy White" <jwhite(nospamat)megr.com>
 Date: Thu, 29 Jan 2009 09:48:31 0500
Title: Message
Agreed, thank
you for your explanation.

Jeremy
Quoting Thor Matteson <thor(nospamat)yosemite.net>:
> Shear flow is defined as VQ/I, whether steel
or any material. The
> definition for Q is the area of the section you are considering connecting
> (called "A") times the distance from the NA of the *entire* section to the
> centroid of the section you are connecting (this distance is called
> "ybar"). ybar is a constant for a given configuration. Just plain "y" is
> the variable used to denote distance from the NA of the overall section.
> The maximum value that y can have is "c", and this is where we get S=I/c
>
> So shear flow is NOT equal to VA/S, nor would it equal VA/Z.
>
> (This is much easier to explain with diagramslook in your mechanics of
> materials book, probably around chapter 7... )
>
> Apologies if this has already been answeredI'm in digest mode, so a day
> behind everyone, PLUS the digests do funny things with equal signs and such
> and I really can't make sense out of anyone else's equations.
>
> Thor Matteson, SE
> www.shearwalls.com
>
> definition for Q is the area of the section you are considering connecting
> (called "A") times the distance from the NA of the *entire* section to the
> centroid of the section you are connecting (this distance is called
> "ybar"). ybar is a constant for a given configuration. Just plain "y" is
> the variable used to denote distance from the NA of the overall section.
> The maximum value that y can have is "c", and this is where we get S=I/c
>
> So shear flow is NOT equal to VA/S, nor would it equal VA/Z.
>
> (This is much easier to explain with diagramslook in your mechanics of
> materials book, probably around chapter 7... )
>
> Apologies if this has already been answeredI'm in digest mode, so a day
> behind everyone, PLUS the digests do funny things with equal signs and such
> and I really can't make sense out of anyone else's equations.
>
> Thor Matteson, SE
> www.shearwalls.com
>
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