Verification of Circular RC Cross Section
The program verifies a reinforced concrete pile using the method of limit deformation (Art 10.1). 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. 10.9.1, 10.9.2)
- Beam - check for dominant bending (Art. 10.5.1)
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 eccentricity.
First, the program computes the ultimate shear strength of concrete Vc. Formulas are from Art. 11.3.4, where the section width (b) is replaced by 0.88×d and effective depth (dv) 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. 11.5.1).