Axial capacity of short column
This calculation provides the axial capacity of a rectangular short column
Output:
- Definitions
- ϕc = Resistance factor for concrete
- ϕs = Resistance factor for reinforcing steel
- fc = Specified concrete strength (psi)
- fy = Specified reinforcing steel yield strength (ksi)
- b = Effective width of cross section (in)
- h = Overall depth of cross section (in)
- nb = Quantity of reinforcing bars
- Axial capacity
- Pr = 0.80 Pro = 0.80 [ α1 ϕc fc (Ag - As) + ϕs As fy]
- α1 = 0.85 - 0.0015*fc = 0.8 (fc in MPa)
- Ag = b d = (12) (30) = 360 in2
- As = nb Ab = (6) (0.775) = 4.65 in2
- Pr = 0.80 [ (0.8) (0.65) (5) (360 - 4.65) + (0.85) (4.65) (60)]
- Pr = 928.85 kip
Notes: