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RE: Partial Rigidity (was ALGOR, EAGLE, ETABS, STAAD etc.)

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> ----------
> From: 	BRBATES(--nospam--at)[SMTP:BRBATES(--nospam--at)]
> Reply To: 	seaoc(--nospam--at)
> Sent: 	Friday, June 05, 1998 11:54 AM
> To: 	seaoc(--nospam--at)
> Subject: 	Partial Rigidity (was ALGOR, EAGLE, ETABS, STAAD etc.)
> Even this linear approach can rapidly diverge from actual behaviour as
> deflections increase. A more accurate modeling of Moment-Rotation
> behaviour is
> with a bi-linear or tri-linear connection model. The question is, what
> stiffness value do you use for the various deflection levels, knowing
> the
> answer varies based on all sorts of parameters such as  column width,
> beam
> depth, connection type, etc.? This, of course, gets quite invloved if
> you're
> trying to model this behaviour for all six DOF and begs the question,
> is it
> really worth the trouble?
> Bruce Bates
> RISA Technologies
Formulating partial-rigid analysis is certainly more complex. Once the
structural model has been set up, it can apply to static and dynamic
analyses. It provides more freedom to model a structure more accurately.
You need to re-consider not only stiffness but also mass definition for
partial-rigid connections. If with temperature distribution, support
settlement,,,, there are something you need to re-consider for
partial-rigid connections.

It works fine with me. I am sorry to learn you think not worth to try.