Trenno, I get your reasoning behind the 20% in your method 2, but that was compared to tributary area method when evaluating the loads to each support. But the topic here is not regarding that. It is regarding whether getting the transferred loads from a full model where transfer slabs are...
I honestly don't think you get the concern here. check the link provided by retired13 above. That example explains the main concern when it comes to transfer slab design. And there is no such a 20% sort of thing. We are talking about evaluating transferred loads not just comparing tributary area...
Trenno, Looks like you are talking about the difference between tributary area method with FEA and 20% is due to beam/slab continuity.
However, I think the main concern of this thread is regarding the transferred loads between full model and traditional load rundown (isolated model floor by...
I still don't get where you get this 20% from. Looks like you are talking about something like moment redistribution? The problem here is in regards to the transferred loads. In isolated floor, pin restraints are assigned to transferred members and thus more loads go to them while in reality it...
How will isolated floor analysis give you 20% more to internal columns? Where does this 20% come from? My opinion is isolated floor analysis will give you more to transferred members and how much more depends on the layout(stiffness).
