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RE: Column Buckling
- To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
- Subject: RE: Column Buckling
- From: Michael Bryson <MBryson(--nospam--at)mhpse.com>
- Date: Tue, 16 Jul 2002 18:07:13 -0700
Salmon and Johnson, pg 548:
force required would be:
Beta = 1 for one brace @ center aL=0.5L
= 4 for infinite number of braces
Pcr = Critical
Euler Buckling Load for aL
stiffness required would be:
k = 2
* Beta * pi^2 * (EI/aL)
EI = stiffness of the compressed element
We are designing a 100 - 24" diameter 1"
Wall thick pipe as a chord. I found a reference using large deflection theray
to determine the greatest deflection. As this is a transit condition, what
force would be needed to hold it from buckling?
----- Original Message -----
Sent: Tuesday, July 16, 2002 6:38
Subject: RE: collector increases
UBC 1633.2.6, last paragraph seems to say you can use Cd=1.33 for
wood with the 1.7 allowable increase.
For a wood collector carrying load to a
For checking combined bending + axial of
collector (load combination of 1612.4, strength level forces) is
it correct to use 1.7 stress increase per 1633.2.6 and 1.33 load
duration factor Cd per Chapter 23 of Div. III ? And if so, why doesn't the
design example in Volume II (page 273-274) use the
For a steel strap connection, (collector to
collector across a girder) or... for the connection of the collector to
the moment frame, same question. Use 1.7 & 1.33 for bolt in wood