OliverLonergan,
Building codes such as the 1997 UBC permits an increase or decrease of negative moments calculated by elastic theory at the supports of continuous flexural members by not more than 20 percent base on Ro balanced, see 1908.4
As your simple support reaction decreases as plastic...
helmueller (Structural)
In designing the foundation you may find that resisting the overturning moments by utilizing the walls are much easier and cheaper than beefing up the braced frame to resist by itself. The braced frame will increase substantially by the increased story and lack of...
