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Punching Shear of Edge Column

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gmoney731

Structural
Oct 24, 2018
32
Hello,

I am intending to calculate the punching shear of an edge column sitting on a slab.

Per ACI 318-14 p. 364 Table 22.6.5.2, there are three equations used to determine the 2-way shear capacity. You are to take the smallest value of these three equations and consider that to be your capacity.

In the case of a corner/edge column, I see only one of those three equations that are applicable:

Vc = (2 + alpha*d/b0)*lamda*(sqrt(f'c))*b0*d

The alpha is considering corner/edge effects. My question is this:

Is the referenced equation above the "only" equation I should use to consider my capacity, or should I still consider all three equations?

Should the perimeter (b0) be adjusted for the referenced equation, even if alpha is already accounting for the edge/corner effect?
 
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All equations are considered, and the shear perimeter is the reduced shear perimeter.
 
In addition to what canwesteng stated, look also the equations for permissible stress in ACI 318-19, they have been changed.
 
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