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Partial Rigidity (was ALGOR, EAGLE, ETABS, STAAD etc.)[Subject Prev][Subject Next][Thread Prev][Thread Next]
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- Subject: Partial Rigidity (was ALGOR, EAGLE, ETABS, STAAD etc.)
- From: <BRBATES(--nospam--at)aol.com>
- Date: Fri, 5 Jun 1998 11:54:32 EDT
J. Luo wrote: << Partial rigid connections allow the connection rigidity to be adjusted << between zero and full strength (100%). For example, an 3D member has 2 << nodes, each of which has 6 dofs. Each dof has a connection rigidity. << Every connection rigidity (moment, torsion, axial force, and shear << force) can be adjusted. This can model a structure more accurately. 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
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