GFRP Column Designer

CSA S806-26 · FRP-reinforced concrete column design — ULS, SLS, P–M interaction

Untitled ProjectC1400 × 400 mmρF = 1.77 %governing Cl. 8.2.3 · U/C 1.00
Adequate

Project information

Appears on the printed calculation sheet

Concrete properties

CSA S806-26 Cl. 6.5.3 · CSA A23.3

fr — Eq. 8.4
3.550 MPa
Ec — A23.3
28,165 MPa
α₁ — Eq. 8.8
0.798
β₁ — Eq. 8.9
0.883

FRP longitudinal reinforcement

Certified mill values required — presets are indicative only

εFu = fFu/EF
0.0200
Service limit — 30 % fFu
300.0 MPa

Transverse FRP properties

Ties / spiral bar — Cl. 8.4.3.12/13

fF,tie = min(0.4fFu,t, 0.005EF,t)
250.0 MPa
fFh = min(ϕF fFu,t, 0.008EF,t)
400.0 MPa

Column geometry

Cl. 8.4.3 — section and unsupported length

Ag
160,000.00 mm²
d
340.0 mm
d'
59.00 mm

Longitudinal reinforcement

Cl. 8.4.3.6–9 · ρF permitted range 1 %–8 %

Compression face (top)
Ab = 254.5 mm² · layer = 763.41 mm² · d' = 59.0 mm
Side bars (per face)
Ab = 201.1 mm² · layer = 402.12 mm² · d_s = 152.7, 246.3 mm
Tension face (bottom)
Ab = 314.2 mm² · layer = 1,256.6 mm² · d = 340.0 mm
Total 11 bars · AF = 2,824.29 mm²
ρF = 1.765 %
0 %1 % min8 % max10 %
Clear spacing (bottom layer) = 73.33 mm vs min 30.00 mm

Transverse reinforcement

Cl. 8.4.3.13/14 — ties or spiral

s,max governing
192.0 mm

Loads

Factored and service actions about the strong axis

Eccentricity e = Mf/Pf
86.67 mm
Service eccentricity
60.00 mm

Cl. 7.1.6.4 The compressive contribution of FRP longitudinal bars is neglected; bar area is treated as concrete throughout the axial and P–M calculations.