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RE: P-Delta analysis

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Please clarify what you mean by "it uses the beam stiffness instead of the
stability function (beam - column stiffness)".

One caution I've found when modeling for P-delta analysis is that you must
have a joint located at the point of maximum displacement, since the
software typically just uses deflection at joints to check P-delta effects.

> -----Original Message-----
> From: maaz siddig ibrahim [mailto:maaz_siddig(--nospam--at)]
> Sent: Friday, February 01, 2002 11:29 AM
> To: seaint(--nospam--at)
> Subject: P-Delta analysis
> Dear sirs :
> I have some convusion with respect to the P-Delta analysis
> which is used
> instead of the magnification factor in ACI for the additional
> moment and
> shear forces due to the effect of the axial load .but I have
> made some tests
> for this method so I found that the P-Delta method can not
> give you the
> correct critical load because it use the beam stiffness instead of the
> stability function (beam - column stiffness ),the calculated
> critical load
> is more than the real one which is for me not conservative,If
> some one has
> more informations about this method , I wait a reply .
> Thanks
> Engineer :Maaz Siddig
> Abu Dhabi

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