Input
Results
a/d ratio—
ϕ·Vn cap (geometry)—
Avf (shear-friction)—
An (direct tension)—
Af (flexure, Mu = Vu·a + Nuc·(h−d))—
As main = max(Af + An, ⅔Avf + An)—
As min = 0.04·(f'c/fy)·b·d—
Ah (closed stirrups, ≥ 0.5(As−An))—
Method
ACI 318 §16.5: a/d ≤ 1.0 required. ϕVn ≤ ϕ·min(0.2·f'c·b·d, (3.3+0.08·f'c)·b·d, 11·b·d) — capped (MPa, mm). ϕ = 0.75. Mu = Vu·a + Nuc·(h−d). Af = Mu/(ϕ·fy·0.9·d). An = Nuc/(ϕ·fy). Avf = Vu/(ϕ·fy·μ·λ). As = max(Af+An, ⅔·Avf+An). As ≥ Asmin = 0.04·(f'c/fy)·b·d. Ah ≥ 0.5·(As − An) distributed in upper ⅔·d.