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. 188.8.131.52)
- Beam - check for dominant bending (Art. 184.108.40.206)
ρmin obrained from table 17.3.
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.
First, the program computes the ultimate shear strength of concrete VRd1. Formulas are from Art. 220.127.116.11 - Model I, where the section width (bw) is replaced by 0.88×d and effective depth (d) is replaced 0.8×0.9×d.
If the ultimate shear strength of concrete is exceeded, the ultimate shear strength Vmax and strength of reinforced section Vs are checked (Art. 18.104.22.168).