Verification
James K. Wight - Reinforcement & Concrete - Seventh Edition: Example 15-2
James K. Wight - Reinforcement & Concrete - Seventh Edition: Example 15-2
Values: L = 11' 2''; B = 11' 2''; c = 18''; d = 18"; DL = 400 kips; LL = 270 kips
Outputs:
- Factored net Soil Pressure:
7.31
ksf (Book) =7.31
(Application) - New Critical Shear perimeter:
805
ksf (Book) ≈804.53
(Application) - Critical Section for one way Shear:
308
ksf (Book) ≈308.26
(Application) - Moment:
954
kip-ft (Book) ≈953.97
(Application) - Reinforcement: As in both direction =
7.79
in² (Book) ≈7.85
in² (Application) - Development Length inside footing =
54.8
in (Book) ≉32.9
(Application)- Author of Book used the following Formula:
ld = 54.8 db 𝜳e / 𝝀
- Application used Equation 12-1 Section 12.2.3 - ACI 318-11 which is more accurate
- Author of Book used the following Formula:
- Area of dowels required:
1.76
in² (Book) =1.76
in² (Application) - Development Length in Column:
23
in (Book) ≈22.5
in (Application)
James K. Wight - Reinforcement & Concrete - Seventh Edition: Example 15-4
James K. Wight - Reinforcement & Concrete - Seventh Edition: Example 15-4
Values: L = 12'; B = 10'; c = 16''; d = 16"; DL = 180 kips; LL = 120 kips
Outputs:
- Factored net Soil Pressure:
4.2
ksf max &2.6
ksf max (Book) =4.2
ksf max &2.6
ksf max (Application) - Critical Shear perimeter:
374
ksf (Book) ≈373.68
(Application) - Critical Section for one way Shear:
147
ksf (Book) ≈138.44
ksf (Application)- Author of Book used uniform pressure 4.2 ksf below footing which give the maximum Vu value
- Application took used the exact pressure under footing which give the proper Shear value
- Moment: 563 kip-ft (Book) ≈ 563.62 (Application)
- Reinforcement: As in both direction = 6 in² (Book) ≈ 6.01 in² (L) & 7.82 in² (B) (Application)
- Development Length inside footing = 48 in (Book) ≉ 26.6 (Application)
- Author of Book used the following Formula: ld = 54.8 db 𝜳e / 𝝀
- Application used Equation 12-1 Section 12.2.3 - ACI 318-11
Alan Williams - Structural Engineering Reference Manual: Example 2-4
Alan Williams - Structural Engineering Reference Manual: Example 2-4
Values: L = 6'; B = 6'; c = 12''; d = 12"; Axial Load = 200
Outputs:
- Factored net Soil Pressure:
5.56
ksf (Book) =5.56
ksf max (Application) - Critical Shear perimeter:
177.7
ksf (Book) =177.7
(Application) - Critical Section for one way Shear:
50
ksf (Book) ≈50
ksf (Application) - Moment: 104.3 kip-ft (Book) ≈ 104.17 (Application)
- Reinforcement: As in both direction = 2 in² (Book) ≈ 2.07 in² (Application)
- Development Length inside footing = 13.2 in (Book) ≈ 13.2 (Application)
Teng's Chart - Graphical method (Wayne C Teng) - Max Pressure - Trial 1
Teng's Chart - Graphical method (Wayne C Teng) - Max Pressure - Trial 1
Values: L = 10'; B = 12'6"; c = 18''; d = 18"; Axial Load = 1200; Mx = 3000 k-ft; My = 1200 k-ft
Outputs:
- Max Pressure:
K x 9.6 ksf = 3 x 9.6 = 28.8
ksf (Graph) ≈28.6
ksf (Application)
Teng's Chart - Graphical method (Wayne C Teng) - Max Pressure - Trial 2
Teng's Chart - Graphical method (Wayne C Teng) - Max Pressure - Trial 2
Values: L = 10'; B = 12'6"; c = 18''; d = 18"; Axial Load = 1200; Mx = 3000 k-ft; My = 4500 k-ft
Outputs:
- Max Pressure:
K x 9.6 ksf = 10 x 9.6 = 96
ksf (Graph) ≈95.5
ksf (Application)