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# RC member design for biaxial bending and axial force

In this page we discuss the results for RC design for a cantilever beam subjected to biaxial bending and axial force.

You can find the model in WeStatiX ready for your calculation.

In the table below you can read the cross section parameters

And the material parameters

If you take a look to the RC member design results you will find the total area of reinforcement to be $$A_{s,tot}=29,02 cm^2$$.

You can check it by using the interaction diagrams as suggested in [1]. According to it, you need to find the following parameters

So you have to consider the interaction diagrams for the design for biaxial bending and axial force for a section with d’/h=0,10 and d’/h=0,15, showed below

It’s easy then to find the reinforcement total area

You can finally calculate the error as follows

$$\epsilon = 1-\frac{29,02}{29,16} = 0,48\%$$

WeStatiX matches the solution.

[1] A.W.. BEEBY and R.S: NARAYANAN – Designers’ guide to Eurocode 2: design of concrete structures. – Designers’ guide to EN1992-1-1 and EN1992-1-2 Eurocode 2: design of concrete structures. General rules and rules for buildings and structural fire design.