02-25-2021, 02:07 PM
Recently acquired an HP 11c after having used TI's my whole life.
Here is a little program to calculate the required reinforcement ratio and required area of reinforcing steel.
setup:
Design Moment - Mu (ft-kips) STO 1
Cross Section Width - b (in) STO 2
Effective Depth to Tension Steel - d (in) STO 3
Concrete 28-day Compressive Strength - f'c (ksi) STO 4
Steel Yield Strength - fy (ksi) STO 5
Here is a little program to calculate the required reinforcement ratio and required area of reinforcing steel.
setup:
Design Moment - Mu (ft-kips) STO 1
Cross Section Width - b (in) STO 2
Effective Depth to Tension Steel - d (in) STO 3
Concrete 28-day Compressive Strength - f'c (ksi) STO 4
Steel Yield Strength - fy (ksi) STO 5
Code:
Keystroke Checksum Comment
F LBL A 42,21,11
RCL 1 45 1 Mu
RCL 2 45 2 b
RCL 3 45 3 d
G x^2 43 11 d^2
* 20
. 48
9 9
* 20 0.9*b*d^2
/ 10 Mu/0.9*b*d^2
1 1
2 2
* 20 conv. ft to in = 12*ans
STO 6 44 6 Ku
1 1
RCL 6 45 6
2 2
* 20 2*Ku
RCL 4 45 4 F'c
. 48
8 8
5 5
* 20 0.85*F'c
/ 10 2*Ku/0.85*F'c
- 30 1 - (2*Ku/0.85*F'c)
√x 11 √1 - (2*Ku/0.85*F'c)
- 30 1-√1 - (2*Ku/0.85*F'c)
RCL 4 45 4 F'c
. 48
8 8
5 5
* 20 0.85*F'c
* 20 (0.85*F'c)*1-√1 - (2*Ku/0.85*F'c)
RCL 5 45 5
/ 10 ρ
ENTER 36 copy ρ to stack
ENTER 36 copy ρ to stack
RCL 2 45 2 b
RCL 3 45 3 d
* 20
* 20 As = ρ*b*d
G RTN 43 32 As in X register
ρ in Y register