Civil Engineering Reference
In-Depth Information
Bending moment due to dead load plus 20% of live load is
DL+0.20LL
SL
kipft
ft
⋅
m:=m
sMax
⋅
=3.2
⋅
creep
Ratio of modulus of elasticity of bars to modulus of elasticity of concrete is
E
E
f
n:=
=1.399
f
c
Ratio of depth of neutral axis to reinforcement depth, calculated per
Equation (8-12), is
(
)
2
k:=2 n+
ρ⋅
ρ⋅
n
−ρ ⋅
n =0.122
f
f
f
f
f
f
f
The tensile stress in the FRP is computed as
m
Amin d,d1
k
3
creep
f
:=
=13.1ksi
⋅
fcreep
(
)
f
⋅
⋅
−
f
f1f2
“OK” if f
≤
f
(f
=16 ksi)
⋅
fcreep
f_creep
f_creep
Check_Creep:
=
“N ot good”otherwise
Check_Creep = “OK”
ε
f2_creep
= 0.0023
A
f
d
f2
= 6.5
·
in
k
creep
·
ε
fu
= 0.00281
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