Civil Engineering Reference
In-Depth Information
Number of bars per level of reinforcement is
Nifi 0
2if1 iN 2
Nifi
=
bar0
N i) :
=
≤≤
−
−
bars
f
=
N1
bar0
f
Total area of FRP reinforcement per level of reinforcement is
A
f
(i) := A
f
_
bar
·N
bars
(i)
The FRP reinforcement area shall not be smaller than 1% of the cross-
section gross area:
A
f
_
min
:= 0.01·b·h = 4·in.
2
N1
−
N1
−
f
f
∑
∑
()
()
2
“OK” if
Ai A
≥
Ai 6.28 inf
=
⋅
f
f _min
f
Check_MinReinf :
=
i0
=
i0
=
“Not satisfied” otherwise
Check_MinReinf = “OK”
9.5.1 Point 1—Pure compression
ε
cu
= 0.003
h = 20·in
Nominal axial strength is
P
n1
:= 0.85f ′
c
·b·h = 1700·kip
Nominal flexural strength is
M
n1
:= 0 kip·ft
Maximum tensile stress in FRP bars is
ε
f1
:= 0
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