The code is ACI 318 08. Asmin in ACI is:
English Units (psi and inches)
Metrics units (Mpa and meters)
The results are not the same.
The same happens with all beam I tried.
Thanks in Advance!
Sorry my english!
Hi rafal, here is the example. Abmin should be 2.53 cm2.
Thanks!
It should be :
fc = 24.1MPa => 3495 psi
fy = 413.68 MPa => fyd = 60000 psi
bw =0.2m =7.87in
d = 0.4m-0.0581m = 0.3419m = 13.46 in
asmin =3*sqrt(fc)/fy*bw*d = 3*sqrt(3495)/ 60000 * 7.87 * 13.46 = 0.31in^2
asmin = 200*bw*d/fy = 200*7.87*13.46/ 60000 = 0.3531in^2 = 2.28cm2
But we additionally check condition 10.6.4, which gives us also min area, but unfortunately this condition is always checked for rebar #8, instead of #5 as it should be in this example.
I have reported it to dev team for correction.
Thanks for the response!. The equation (asmin =3*sqrt(fc)/fy*bw*d ) should be 0.31 in2 (2.01 cm2) instead 3.107 in2, correct me if Im wrong.
Thanks again.
Eduardo
I am sorry Rafal, please enlighten me what is condition 10.6.4? it extract from ACI 318?
Thank you