I have a 4 story building that is "L-shaped". Currently I have moment frames from the foundation to the roof in both wings and I've even tried having some down the middle. I followed the Ram Frame tutorial as best as I could (no pictures), but I seem to have some serious mistake in my model. When I run the Analysis, I receive no warnings. When I do the steel check for the generated load combinations, I have failures from the 3rd floor to the foundation. The columns and beams fail with the C2-3 formula: Pnt > Pe2x. No matter what column size I select, I still have this error. The top floor works fine.
I am clueless as to what to do here. This showed up when I selected to have P-delta checked in the analysis. If I take it out, I can make things work just fine. Did I miss something easy during the modeling phase?
All beams and columns are fixed at each level and to the footings. The floor diaphragms are 1.5" deck with 4.5" additional concrete at each floor and a standard roof deck on the top. The roof is semi-rigid and the floors are rigid. I did notice that the K value for my columns after analysis is still 1, but I can't change that - it's calculated for me. I thought for sure when I changed my columns to an enormous size, that surely I could receive some results.
Thanks,
Lance