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Re: Brace Connection Moment from Eccentricity

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In fact Mc=V*ec/2 is correct considering that the applied moment (V*ec) is
resisted by two moments of the same sign (2*Mc), one above and one below the
conection.

Javier Encinas
ASDIP Structural Software
www.asdipsoft.com

----- Original Message -----
From: <j.grill(--nospam--at)attbi.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Wednesday, January 08, 2003 8:38 PM
Subject: Brace Connection Moment from Eccentricity


> I've been fighting through a lot of brace connections in the last couple
of
> weeks.  In the AISC Connections manual for the "Uniform Force Method" The
> author explains a "special case 1" in which the work point of the brace
point
> is not at the center line of the column and beam but at the corner of the
> gusset.  This induces a moment to the column and the beam.
>
> My questions are these.  In the explanation for the special case (page
7-109)
> the moment to the column is listed as Mc=2*V*ec.  Example 22 and on page
7-110
> the moment is listed as V*ec/2.  The first equation in the paragraph on
page 7-
> 109 appears to be a typo.  Right?
>
> My next question is this.  For the column moment to be V*ec/2 the brace
> location must be at the mid-height of a column.  Right/wrong?  And if the
> brace is at the top of a column the column moment would be Vc*ec.
> Right/wrong?  I seem to be questioning my own mechanics today, and I
believe
> the text is kind of over-generalizing, unless I just need to go home.
>
> Joseph R. Grill, PE
>
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