2.7.10.4 Determining the critical surface

Determining the critical surface

The top surface (-z) proves to be the critical surface. For further calculations, only the bending moment and the axial force of this surface are considered.

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