Design of square footing for a single column - Reinforced Concrete with FRP Bars: Mechanics and Design - page 376

The FRP reinforcement ratio is

A
bd =0.00561

f

ρ= ⋅ : Equation (8-2)ofACI 440.1R-06

f_des

f

“OK” if ρ ρ

f_des fsmin

Check_MinReinf : =

“Not satisfied” otherwise

Check_MinReinf = “OK”

FRP bar spacing: The bar clear spacing is

b −φ ifN =1

f_bar bar

s: = otherwise

b2cN
N

−− ⋅φ
−

f0

c bar f_bar

1

bar

s f0 = 7.4 02·in.

The minimum required bar spacing is

s f _ f_min := max(1·in,ϕ f _ bar ) = 1.27·in.

“OK” if s ≥ s

f0 f_min

Check_BarSpacing: =

“Too many bars”otherwise

Check_BarSpacing = “OK”

The bar spacing is

s f1 := s f0 + ϕ f _ bar = 8.7·in.

Design flexural strength: The balanced reinforcement ratio, ρ fb , is com-
puted per Equation (8-3) of ACI 440.1R-06:

β ⋅ ′

f
f

E
E f

⋅ε
⋅ε

c
fu

f cu

ρ= :0.85 ⋅ =0.01795

1

fb

f cu fu