Dear Srs.,

I know that Caesar II performs first order analysis assuming that the properties of the structure are constant and that deflection do not have any effect on the structural behaviour (linear analysis). However, in same cases, the deflection of the structure can have a geometric second order effect on the behaviour of the structure, which is not captured by the linear first order analysis.

Is it possible to create an iterative procedure to analyse this type of geometric non-linearity using Caesar (linear structural program)?

Thank you.
Roberto

For pressure piping design, whether we permit the piping deflection to come to be so big as to we will consider the P-Δ effect?

I don't think so!

Seems like a job for Abaqus to me.

I think the question is related to column buckling. The best way to avoid its occurence is to provide sufficent guides.

I don't think there is a way to check it using Caesar.

Caesar doesn't check against buckling colapse. As far as I know the only way is a manual calculation according to Euller's buckling formula.

I just want to know if it's possible to create a quick procedure to verify a system against buckling. There is a german software called Rohr2 which have the capability of evaluating buckling shapes according to second order theory. Of course the buckling Rohr2 procedure is not a simple calculation, but perhaps there is a simplified method to do this.

For example, I found on internet an article (http://www.albertloh.com.sg/) which presents a simple procedure for performing second order analysis using a linear structural program (caesar). Does anyone hear about this?

Thank you again.
Roberto