Design of a column - Reinforced Concrete with FRP Bars: Mechanics and Design - page 351

First guess:

k 0 := 0.2

Given:

S o (k 0 ) = 0

Solve for k:

k elastic := root(S o (k 0 ),k 0 ) = 0.15

The concrete shear capacity, V c , can be calculated per Equation (9-1) of
ACI 440.1R-06:

( ) ( )

V: 5f psib = ′ ⋅ ⋅ k ⋅ d N1= 18.1kip − ⋅ c c

elastic f f

The shear reduction factor given by ACI 440.1R-06 is adopted:

ϕ v := 0.75

1
2

⋅φ ⋅ V=7kip ⋅

v c

“OK. No shearreinforcementisneeded.”

if 1
2

Check_ShearReinf : =

⋅φ ⋅ VV ≥

v c u

“Shear reinforcementisneeded”otherwise

Check_ShearReinf = “Shear reinforcement is needed”

Design shear reinforcement: The ACI 440.1R-06 minimum manufac-
turer's guaranteed mechanical properties of the selected bars are

Design shear reinforcement
Stirrup_Size :=

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