One-Way Shear Strength.

İnternational Design Codes

ACI 318-19 : One-Way Shear Strength per ACI 318-19 with ideCAD

TSC 2018 : TSC One-Way Shear Strength

Notation in ACI 318-19

A_c-sh = area of concrete used to determine shear stress, in²
A_g = gross area of concrete section, in²
b_w = web width or diameter of circular section, in.
d = distance from extreme compression fiber to centroid of longitudinal tension reinforcement, in.
f_c ^' = specified compressive strength of concrete, psi
(f_c^')^0.5 = square root of specified compressive strength of concrete, psi
f_yt = specified yield strength of transverse reinforcement, psi
h = overall thickness, height, or depth of member, in.
N_u = factored axial force normal to cross section occurring simultaneously with V_u or T_u; to be taken as positive for compression and negative for tension, lb
s = center-to-center spacing transverse reinforcement, in
V_c = nominal shear strength provided by concrete, lb
V_n = nominal shear strength, lb
V_s = nominal shear strength provided by shear reinforcement, lb
V_u = factored shear force at section, lb
ϕ = strength reduction factor
λ = modification factor to reflect the reduced mechanical properties of lightweight concrete relative to normal weight concrete of the same compressive strength
λ_s = factor used to modify shear strength based on the effects of member depth, commonly reffered to as the size effect factor

Nominal one-way shear strength at a section, is calculated by using concrete and transverse reinforcement properties.