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 0.002 - 0.0035. Compression reinforcement is not taken into account.
The computed degree of reinforcement is checked using the following expressions:
where:
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 MSd.
The permissible moment for a given area of reinforcements As reads:
The program further checks whether the location of the neutral axis x is less than the limit location of neutral axis xlim given by:
where:
Shear
First, the program computes the ultimate shear strength of concrete VRd1.
where:
If the ultimate shear strength of concrete is exceeded, the ultimate shear strength VRd2 is checked.
where:
Next, the necessary reinforcement area is given by:
