Verification of Rectangular RC Cross Section
The cross-section is rectangular, unilaterally reinforced, and loaded by the bending moment and normal compression force. The program verifies a reinforced concrete section using the method of limit deformation. The maximum allowable strain of concrete in compression is 0.003. Compression reinforcement is not taken into account. Minimum eccentricity is applied: (Art. 4.3.7.5):
The computed degree of reinforcement is checked using the following expressions (Art. 5.5.4.2, 5.5.4.5):
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.
Bending without normal force
The cross-section is rectangular, reinforced on one side, and loaded by the bending moment MEd.
The permissible moment for a given area of reinforcements As reads (Art. 2.3.2.3, 4.3.2, 4.2.1.2):
The limit location of the neutral axis is found from:
Shear
First, the program computes the ultimate shear strength of concrete VRd,c (Art. 4.3.3.2.1).
where (Art. 2.3.2.4):
If the ultimate shear strength of concrete is exceeded, the ultimate shear strength VRd,max is checked (Art. 4.3.3.4.6).
Next, the necessary reinforcement area is given by (Art. 4.3.3.4.3):
