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- To: seaint(--nospam--at)seaint.org
- Subject: Bridge specs
- From: Michael Hemstad <mhemstad(--nospam--at)mbjeng.com>
- Date: Thu, 15 Dec 2005 10:05:43 -0600
- Cc: ctowne(--nospam--at)chaptech.com
For heat-curved beams, my 1993 specs
(they are the design specs) in section 10.15.2 specify a minimum radius of
horizontal curvature of 150 feet and the larger of
R = 14 b D/[(sqrt Fy)X
R = 7500 b/(Fy X)
D is web height
b is widest flange width
X is ratio of area of both flanges to total
tw is web thickness
R is radius in INCHES (tricky
In addition, if flange thickness exceeds 3
inches or flange width (b) exceeds 30 inches, the minimum radius is 1000
feet. This to me qualifies as a very coarse step function.
For tighter radii, of course, they just cut
the flanges curved and flex the web.
bridge engineer a long time ago.
> Does anyone here have a copy of the AASHTO Standard
> Highway Bridges? (Note that this is not the design
> Article 10.15.2 of Division 1 states something about the
> a girder can be heat curved. If anyone can help me with
this, I would
> appreciate it.