I am modeling a 2 story building with rigid diaphragms at the roof and second level. The building is comprised of just moment frames, but I'm getting load distribution to the moment frames in their weak axis. I am also getting relatively low building frequencies in both directions, despite having a drift < 1". The building has pretty large columns and beams already, so I'm not sure what's causing the weak axis frames to participate in resisting wind load in a way they're not intended.
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