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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.

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