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Punching shear at corner column with odd drop panel 3

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Lion06

Structural
Nov 17, 2006
4,238
I have a corner column in 2-way flat plate construction, that has an odd drop cap condition. This is my first time doing flat plate, so this is my first real world experience checking things like punching shear for the slabs.

I have a corner condition that has a drop cap in just one of the four quadrants around the column (see attached sketch).

The software I'm using is giving no benefit to the punching shear capacity from this portion of a drop cap. That doesn't seem to make sense to me, but I'm not quite sure how to approach checking this.

ACI and PCA Notes don't really give any guidance (that I can find) on how to handle a drop panel like this. I can't find anything good in CRSI, either. What's really kind of throwing me for a loop is that the software is not only neglecting the drop cap, but treating the critical section like it has only 3 sides. I don't see anything in ACI that would limit me to 3 sides on the critical section.

Can anyone see what I'm missing?
 
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