Bolted connection
Bolted connection
(OP)
Is a bolted connection modelled as a fixed or pinned joint? Example channel bolted to tubing, analyzing channel.
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RE: Bolted connection
RE: Bolted connection
Without seeing the connection or having more detail one can't say for sure. For modeling purposes, I would also assume it is a pinned connection.
RE: Bolted connection
RE: Bolted connection
Good luck.
RE: Bolted connection
RE: Bolted connection
For example, a pinned-pinned beam, point loaded in the middle, will have a maximum bending moment in the middle, zero moment at the end, and highest shear at the ends. A fixed-fixed beam has a moment at both the end and the middle, and a high shear at the ends.
Now if the beam is uniform along it's length, then it can be easily seen that the pinned-pinned condition is conservative for all sections. However, it the beam tappers towards the ends/attachment points, then you may have a situation where the ends are more critical under a fixed-fixed situation.
This situation of Degree of Restraint is very well explained by Flabel in "Practical Stress Analysis for Design Engineers", starting on page 39.
So a little engineering judgement is required here.
Regards,
jemaker
RE: Bolted connection
I have tried locating the file, on my own, at aisc.org, as you have specified. There are several excellent resources available for free downloads, but, I failed to locate the one which you refer to.
Thank you!
RE: Bolted connection
RE: Bolted connection
Could you, please, e-mail that Connection Illustration to ivehabovic@tas.com ?
Thanks,
Ibro V.
RE: Bolted connection
http://www.aisc.org/Content/ContentGroups/Engineering_a...
RE: Bolted connection
If you consider the connection between channel and tube, it is proper that the connection is pinned when the channel is bolted to the wall of tube that is transverse to longitudinal axis of channel, because the wall of tube is small stiffness. If with additional plates, the channel is bolted to the side wall of tube which is pallel to longitudinal axis of channel, this connection would be considered as fixed connection.
RE: Bolted connection
jpp@birschbach.com
Thank you!