Shear reinforcing pile cap 2

[slickdeals]

Folks,
I am required to design a pile cap where I am limited in depth and controlled by one way shear at "d" beyond the face of the column. I am using ACI prescribed value for Vc = 3.5 sqrt (fc').

Can anyone provide pointers to how shear reinforcing could be used to make up the difference needed to carry the shear through reinforcing?

I have looked in vain online for suggestions and I am sure someone here has done something similar.

 

[civilperson]

A higher strength concrete, say 8500 psi, should help on shear strength calculations making the six foot thickness workable.

 

[hokie66]

In the case of your pile cap, there may be tension in the top between the columns, so you would have to reinforce accordingly. I think that you will find your question about T&S reinforcement moot, as the required tension reinforcement top and bottom added together will exceed the .0018 requirement.

 

[vandede427]

before you go adding stirrups, back calculate what the required f'c is to eliminate the need for stirrups. if it's simply a matter of going from 3000psi to 5000psi, then do that. if you need something like 8000psi or higher, check the availability of that mix with the local supplier. if not available, then add the stirrups.