Verification of Rectangular Cross-Section Made of Plain Concrete
The cross-section is rectangular, loaded by the bending moment Mf, normal force Pf (applied in the cross-section centroid) and by the shear force Vf. The cross-section bearing capacity subjected to bending moment is given by (Art. 22.6.5):
where (Art. 8.4.2, Art. 8.6.4):
The shear strength is provided by (Art. 22.6.5):
where:
Strength of concrete cross-section subject to the combination of bending moment and normal force is derived from the following expressions depending on the normal force eccentricity e ≥ 0.1h (Art. 22.6.5):
As the greater of:
where (Art. 8.4.2):
Interaction diagram N-M
Usage ratio of concrete cross-section subject to the combination of bending moment and normal force is determined as |0L| / |0R1| or |1L| / |1R2|. Where L is load, R1 is strength with prescribed eccentricity and R2 is strength with prescribed normal force.