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RE: Bent Plate

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After yielding, which has occurred by the nature of making a bent plate, the
yielded segment of the plate follows the stress strain curve "E" slope back
to the point of zero stress (not zero strain).  Future new loading will
follow the same "E" slope back up.  

As long as your design keeps stresses in the elastic realm with the loading,
the bent plate will perform the same as an unbent plate.  If loaded above
the yield to failure, the portion of the plate that has a head start (bent
portion) will reach the ultimate strain first.  Keep the stress to the
allowable % of fy and you should not have a problem.

Make sure you pay attention to the bend line direction and final rolling
direction.

James

-----Original Message-----
From: Todd Hill [mailto:thill(--nospam--at)tkarch.com]
Sent: Tuesday, July 24, 2001 4:39 PM
To: 'seaint(--nospam--at)seaint.org'
Subject: RE: Bent Plate


Actually, the loading varies along with the size of the angles.
I was just curious if the steel plate would lose any capacity after it is
bent during fabrication?
TIA,
Todd

-----Original Message-----
From: Scott A. Dunham, PE [mailto:sadunham(--nospam--at)gte.net]
Sent: Tuesday, July 24, 2001 3:27 PM
To: seaint(--nospam--at)seaint.org
Subject: Re: Bent Plate


What size angle was called for?  What's the loading?

Scott A. Dunham, PE
Dunham Engineering Services
Dothan, AL
334-678-6948

----- Original Message ----- 
From: "Todd Hill" <thill(--nospam--at)tkarch.com>
To: "SEAINT (E-mail)" <SEAINT(--nospam--at)SEAINT.ORG>
Sent: Tuesday, July 24, 2001 11:30 AM
Subject: Bent Plate


> I have a continuos bearing angle called out and the fabricator wants to
> substitute with a bent plate.
> I don't know why he wants to do this, yet.
> Regardless, my question is on the strength of a bent plate. 
> Is there any loss of bending capacity of the plate due to the initial
> bending of the plate during fabrication?
> This kind of reverts back to the loss in rebar strength discussion after
> bending.
> 
> Todd Hill, P.E.
> TK Architects, Inc.
> 816-842-7552 ext. 233
> 
> 
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