RF-CONCRETE Surfaces – Online Manual Version 5

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RF-CONCRETE Surfaces – Online Manual Version 5

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2.5.3.4 Membrane forces

Membrane forces

With the governing lever arm from the preliminary design, it is now possible to transform the internal forces of the linear plate analysis into membrane forces. For this, the equations presented in the design concept (Eq. 2.40) are used.

nsx,+z = mxzmin,+z + nx2 = 123,351,239 + -103.9112 =48,408 kN/m 

nsy,+z = myzmin,+z + ny2 = 54,361,239 + -285,3862 =-98,819 kN/m 

nxy,+z = mxyzmin,+z + nxy2 = -135,391,239 + 135,9352 =-109,910 kN/m 

These membrane forces can also be found in the design details.

Figure 2.68 Membrane forces