Longitudinal and Transverse reinforcement limits are controlled automatically.
Notation
Acv = gross area of concrete section bounded by web thickness and length of section in the direction of shear force considered in the case of walls, and gross area of concrete section in the case of diaphrams. Gross area is total area of defined section minus area of any openings, in.2
fc' = specified compressive strength of concrete, psi
√fc‘ = square root of specified compressive strength of concrete, psi
fy = specified yield strength for nonprestressed reinforcement, psi
fyt = specified yield strength of transverse reinforcement, psi
hw = height of entire wall from base to top, or clear height of wall segment or wall pier considered, in.
lw = length of entire wall, or length of wall segment or wall pier considered in direction of shear force, in.
Vn = nominal shear strength, lb
Vu = factored shear force at section, lb
αc = coefficient defining the relative contribution of concrete strength to nominal wall shear strength
ϕ = strength reduction factor
λ = modification factor to reflect the reduced mechanical properties of lightweight concrete relative to normalweight concrete of the same compressive strength
ρl = ratio of area of distributed longitudinal reinforcement to gross concrete area perpendicular to that reinforcement
ρt = ratio of area of distributed transverse reinforcement to gross concrete area perpendicular to that reinforcement
11.5.4.8 'deki transverse reinforcement formülünü 11.6 ile birleştirdiğimizde aşağıdaki gibi bir donatı yerleştirme silsilesi çıkıyor. Bu nedenle birleşmiş halini atıfta bulunarak yazacağım.
Minimum donatılar için de
18.10—Special structural walls
Burada ACI 21.9.4.1 'diye bir bölüm yok bu formülün elde edildiği yere bakıp duruma göre doğru atıfta bulunarak yazacağım.