Verification of Rectangular Cross Section Made of Plain Concrete
The cross section is rectangular, loaded by the bending moment MSd, normal force NSd (applied in the cross section centroid) and by the shear force VSd. The cross section bearing capacity subjected to bending moment is given by (Art. 24.5.2):
The shear strength is provided by (Art. 18.104.22.168, 22.214.171.124):
where: Acc - compressed area of concrete
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 (Art. 24.5.2):
As the greater of:
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.