Verification of Circular RC Cross-Section
The program verifies a reinforced concrete pile using the method of limit deformation (Art. 5.2.8). The maximum allowable strain of concrete in compression is 0,0025. The degree of reinforcement is checked using the formula:
- Column - check for dominant compression (Art. 3.1.4.3, Art. 3.1.4.6)
- Beam - check for dominant bending
where: | d | - | pile diameter |
As | - | reinforcement area |
Interaction diagram N-M
Usage ratio of concrete cross-section subject to the combination of bending moment and normal force is determined as |0L| / |0R|. Where L is load and R is strength with prescribed excentricity.
Shear
First, the program computes the ultimate shear strength of concrete Qbu (Art. 5.3.3, Appendix 9).
where: | for: | 0.88d ≥ 0.3m | is: κq = 1.25 |
for: | 0.88d > 0.15m | is κq = 1.50 | |
for: | 0.88d < 0.15m | is κq = 1.60 |
If the ultimate shear strength of concrete is exceeded, the ultimate shear strength Qmax and strength of reinforced section Qu are checked (Art. 5.3.2.1).
where (Art. 5.3.5):
The magnitude of c is bounded by the following expression:
