We consider a column with a 0.3 x 0.4 m rectangular section and a 3.10 m height. The concrete class is 25/30. The loads on the column are the following:

The shear verification is done according to article 6.2 of EN1992-1-1.

The sizing combination for the shear verification on the X direction is:

Combination 104 : +1.35x[1 G]+1.5x[2 Q]

Design
shear force V_{Ed} =
135 kN

The shear verification is accomplished if the following relation is satisfied:

V_{Rd} ≥
V_{Ed}

V_{Rd} =
min (V_{Rd,max}; V_{Rd,s})

α_{cw} = 1.2

b_{w} = 0.40 m

z = 0.9 × d

Since, in the design phase, the real d’ is not known, the program will use in the calculation of the concrete cover from the Concrete cover dialog:

In the initial stage, the calculation will be done using the value from the viewport. After a certain number of iterations, a longitudinal reinforcement area and a transversal reinforcement area with specific diameters will result.

In the final stage, the calculation is done again with the real d’ obtained as:

The report will reflect the final stage, with the real value of d’.

The value of Ɵ can be defined in the Design Assumptions dialog, Transversal Reinforcement section (Strut slope).

The program verifies if:

If
not, the spacing s_{real} is decreased
or the transversal bars diameter is increased until the relation is verified.