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P-Delta Vs Large Displacement options

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mgaafar
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P-Delta Vs Large Displacement options

Hi,

   I have a slender frame that I am designing. I noticed that when I check the P-delta option only both the buckling and static analysis becomes unstable (gives the "Matrix is not positive" warning) but when I click on the "Large displacement" option then the warning disappears.

I thought it should be the other way around as the large displacement takes the third order analysis.

or can anyone explain this to me?

Thanks.

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mustafahesenow
in reply to: mgaafar

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Mustafa Hesenow
Senior Structural Design Engineer/MZP
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