Question about different load cases in CSM

[netsonic_Sofistik]

For beam structure with prestress, creep and shrinkage, and stage constructiuon
Which load case should be used for plot the normal force, LC4XXX or LC7XXX ?

I think that the internal forces in LC 4XXX and LC 7XXX should be the same, the only difference between them is the stress results: LC 7XXX includes eignstress while LC 4XXX doesn’t.

This is a post-tesioned concrete bridge constructed by free cantilever method, this is the final moment (after 10 years) in LC 4XXX

This is final moment in LC 7XXX

This is the final moment in RM Bridge

The resultd from LC 7XXX and RM Bridge are similar, the max positive moment in the superstructure is about 60000~70000 kNm, while that in LC 4XXX is about 11000~12000 kNm.

[Konvergenzbube]

The normal force you see either in 4xxx or 5xxx.

[netsonic_Sofistik]

Thanks, but the manual says

LC 7000… must be used to plot stresses and the beam normal force incl. C+S in WINGRAF!

[netsonic_Sofistik]

I add some example in the 1st post.