Verification of Circular RC Cross Section
The program verifies a reinforced concrete pile using the method of limit deformation (Art 17.2). The maximum allowable strain of concrete in compression is 0.0035.
The degree of reinforcement is checked using the formula:
- Column - check for dominant compression (Art. 17.3.5.3)
- Beam - check for dominant bending (Art. 17.3.5.2)
ρmin obtained from table 17.3.
where: | d | - | pile diameter |
As | - | cross sectional area of reinforcement |
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 VRd1. Formulas are from Art. 17.4.2.2 - Model I, where the section width (bw) is replaced by 0.88d and effective depth (d) is replaced 0.8*0.9d.
where
If the ultimate shear strength of concrete is exceeded, the ultimate shear strength Vmax and strength of reinforced section Vs are checked (Art. 17.4.2.2).
