2.7.10.3 Selection of internal design forces

Selection of internal design forces

First, the internal forces are transformed in the first reinforcement direction φ₁. The bending moments have different values for the bottom (+z) and the top (-z) surface; the axial forces have the same algebraic signs after the transformation.

$$\begin{gathered} m_{{\varphi }_1,+z} = -30 \text{kN} \\ {m}_{{\varphi }_1,-z} = 30 \text{kN} \\ {n}_{{\varphi }_1,+z} = n_{{\varphi }_1,-z} = -100 \text{kN} \end{gathered}$$