About P-delta effect

davidjingyu · Post by **davidjingyu** » Fri Mar 27, 2009 10:15 pm

Dear Dr.silvia:

I have a question about P-delta effects.
If I want to consider P-delta effect while dealing with pushover analysis, should i just modify the command:
geomTransf Linear 1
to
geomTransf LinearWithPDelta 1

(in Opensees V2.1.0)

When this modification is done, the result changes much compared with No P-delta effect.

So I wonder whether it is right.

Thank you very much.

david

silvia · Post by **silvia** » Fri Mar 27, 2009 10:17 pm

does it change or not?
try PDelta as the argument, just as the manual says:
opensees.berkeley.edu/OpenSees/manuals/usermanual/

silvia · Post by **silvia** » Fri Mar 27, 2009 10:52 pm

also, if either the Ps or the Deltas are small the effect can be insignificant.

davidjingyu · Post by **davidjingyu** » Fri Mar 27, 2009 11:14 pm

It changes a lot beyond my expected
So i wonder whether there is other command that can control pdelta effects.

silvia · Post by **silvia** » Fri Mar 27, 2009 11:42 pm

check your model.