Hello,
I have included links to two models below. In one model, I can run 2nd order analysis just fine, but the other seems to have issues. the only difference of any substance is that the loading is much heavier in one model, but the sections are capable of carrying that load. Note that both models run totally fine first order. I have consulted a few other experienced users in my office and we are all at a loss. Any help you can offer is appreciated.
Let me know if I can be of any more assistance on this issue. You can reach me at six zero six, three zero nine, four one four seven.
https://aro365531713-my.sharepoint.com/:u:/g/personal/jnichols_fhce_com/EdSVek9GTy9JgqlgbIrF9gQB_6Yzkt-nh6LH4u3xeHEubg?e=hBdjaw
https://aro365531713-my.sharepoint.com/:u:/g/personal/jnichols_fhce_com/ETUlHBYZThZMh26RKAGCIdIB1NQVM6nel9ssmbQ4HLKFGw?e=NbhBwc
Click F1 on the keyboard while the analysis dialog is open to get help on that.
I tried modified and it worked. What is the primary difference between the two solver methods?
Did you use the Modified method? Is it version 16.04.00.187?
I fixed the column bas for RY and also turned off all segmenting on the FEM to rule out any of those settings causing an error, but I am still unable to get the model to run second order.
There could be a problem of columns spinning about their 1 axis. Fix the base vs RY to rule that out. Using tension-only members with P-Delta analysis is the other factor to contend with here. Finally, if you don't want a node at the cross of the X, turn off the option "Add intermediate nodes at member intersections" on the FEM tab. I don't usually recommend this for tension-only X braces.