To: "INTERNET:seaint(--nospam--at)seaint.org" <seaint(--nospam--at)seaint.org>
Subject: Omega-Not and Braced Frame Baseplate Connections
From: Mark Gilligan <MarkKGilligan(--nospam--at)compuserve.com>
Date: Fri, 5 May 2000 16:28:43 -0400
It was asked:
>>>Should the steel design of the anchor bolts be check for Omega loads ?
The concrete design of the anchor bolts is based on section 1923 (p2-168)
the 97 UBC and does not require the use of the omega loads.<<<
Would failure of the anchor bolts before other elements of your system
result in an acceptable failure mode?
Where would energy be dissipated in the system?
The R value for a braced frame was based on the assumption of yielding or
buckling in the brace. If the anchor bolts fail before the brace can yield
or buckle then the use of R for braced frames is not justified. Given this
what R should you use?
If you can answer these questions you will have your answer.