Shear strength acc. ACI 318R-02
Shear strength acc. ACI 318R-02
(OP)
Hi,
the shear strength provided by concret Vc is given in clause 11.3.1.1. The version which I have says:
Vc=2*(sqrt(fc')/6*bw*d
in the internet I found:
Vc=sqrt(fc')/6*bw*d, but realted to the same code release.
Same appwears for the limit of Vs (clause 11.5.6.9):
Vs=8*sqrt(fc')*bw*d
and
Vs=2/3*sqrt(fc')*bw*d
WHAT IS CORRECT ?
Thank you very much,
Martin
the shear strength provided by concret Vc is given in clause 11.3.1.1. The version which I have says:
Vc=2*(sqrt(fc')/6*bw*d
in the internet I found:
Vc=sqrt(fc')/6*bw*d, but realted to the same code release.
Same appwears for the limit of Vs (clause 11.5.6.9):
Vs=8*sqrt(fc')*bw*d
and
Vs=2/3*sqrt(fc')*bw*d
WHAT IS CORRECT ?
Thank you very much,
Martin





RE: Shear strength acc. ACI 318R-02
RE: Shear strength acc. ACI 318R-02
ACI 11.3.1.1, Equation 11-3 shows:
Vc = 2(√f'c)bwd
The value in section 11.5.6.9:
Vs = 8(√f'c)bwd
is a maximum limit on your steel shear reinforcing contribution.
I don't see where there is a Vs = 2/3(√f'c)bwd
Vc and Vs are two different things.
RE: Shear strength acc. ACI 318R-02
When you use a new formula that you are no sure about, check it to make sure it makes sense. In your case a higher area would have resulted in a lower shear capacity - obviously something was wrong.
It doesnt work so well on this formula, but usually putting the units into the formula should give you the correct units as a result (i.e kips/lbs for a force or psi for a stress).
RE: Shear strength acc. ACI 318R-02
11.3.1.1, Equation 11-3
Vc = 0.17(?f'c)bwd
11.5.7.9:
Vs = 0.66(?f'c)bwd
RE: Shear strength acc. ACI 318R-02