Verification of Rectangular Cross Section Made of Plain Concrete
The cross section is rectangular, loaded by the bending moment MEd, normal force NEd (applied in the cross section centroid) and by the shear force VEd.The shear strength is provided by (Art. 12.6.3):
where: Acc - compressed area of concrete
Standard value of the coefficient k is built-in the program (Art. 12.6.3) - this value can also be adjusted in the program based on the selected National annex.
Strength of concrete cross section subject to the combination of bending moment and normal force is derived from the following expressions (Art. 12.6.1) depending on the normal force eccentricity e:
As the greater of:
Formula express the strength with linear stress-strain diagram of cross section without the crack.
Minimal values of eccentricity are from article 6.1(3).
Standard values of coefficients αcc,pl, αct,pl, γc are built-in the program - these values can also be input by the user depending on the selected National annex.
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.