PROFIS ENGINEERING
CAS 1 / CAS 2 s’ applique aux rangées 1 et 3: calculez V cbg de la rangée 3 en utilisant c a1, rangée 3.
V b = 7 l e d a
0.2 d a λ a f ′ c c a1
1.5
Consultez la zone ombragée jaune.
ACI 318-19 Eq.( 17.7.2.2.1a)
l e = MIN h e f | 8d a = 6.0 in h ef = 14,0 po d a = 0,75 po
Béton de poids normal: λ = 1,0 → λ a = 1,0 ACI 318-19 Tableau 17.2.4.1
V b = [( 7)( 6,0 po / 0,75 po) 0, 2( 0,75 po) 0, 5 ]( 1,0)( 3 500 psi) 0, 5( 18,0 po) 1, 5
= 41 513 lb V b = 9λ a f ′ c c a1
1.5 f’ c = 3 500 psi
ACI 318-19 Eq.( 17.7.2.2.1b)
c a1, rangée 3 = 18,0 po
V b =( 9)( 1,0)( 3 500 psi) 0, 5( 18,0 po) 1, 5 = 40 662 lb f’ c = 3 500 psi c a1, rangée 3 = 18,0 po
8d a = 6,0 po CONTROLS vérification: conception V b = MIN { 41 513 lb; 40 662 lb } = 40 662 lb
V cbg =
A Vc A Vc0 ψ ec, V ψ ed, V ψ c, V ψ h, V ψ parallel, V V b
V cbg, rangée 3 =( 1248 po 2 / 1458 po 2)( 0,939)( 1,0)( 1,0)( 1,3)( 1,0)( 40,662 lb)
= 42 487 lb
ACI 318-19 17.7.2.2 |
A Vc = 1248 po 2 |
A Vc0 = 1458 po 2 |
ψ ec, V = 0,939 |
ψ ed, V = 1,0 |
ψ c, V = 1,0 |
ψ h, V = 1,3 |
ψ parallèle, V = 1,0 |
V b = 40 662 lb |
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