It is possible to dimension a section by giving the strengths with their magnification factors. Its meanings are:
Strength | Units | Positive sign is | Meaning |
Axial force | kN | traction | Force in the axe of the section |
M1 | kN·m | traction down | Momentum around an horizontal axe |
M2 | kN·m | traction down | Secondary Momentum around a vertical axe |
Shear | kN | Shear force in the section |
All these strengths should have magnification factors applied to them. They are used to calculate the section for ultimate resistance.
In order to calculate fisuration, the strengths without magnification are necessary. To approximate them, it is used the service factor. To obtain them, the following applies:
Strength(service)=Strength(magnified)/service factor