RE: Concrete SMF Joint Shear Check Concrete Strength

Jacob Pulfer — Tue, 04 Jan 2022 21:59:19 GMT

Hi Seth -

I looked into it more, and I can find joints where the "joint shear" f'c is equal to either the column's or beam's f'c. Seems to be random but most match the beam f'c in my model.

Regardless, the joint shear strength calculation uses the column's f'c even if the report says otherwise, so it looks like the values are correct.

Running the numbers for the joint design that I attached to the previous post:

f'c = 5 ksi : 0.85*15*sqrt(5000)*32*54/1000 = 1558 K

f'c = 10 ksi : 0.85*15*sqrt(10000)*32*54/1000 = 2203 K

Thanks,

RE: Concrete SMF Joint Shear Check Concrete Strength

Seth Guthrie — Thu, 30 Dec 2021 21:46:33 GMT

I ran a test and on my report the column f'c is reported at the top (version 17.02, ACI 318-11, SMF, 7 ksi columns vs 4 ksi beams).