5. Fatigue actions

5.1 Origins and standards

Fatigue actions, resulting from stress fluctuations, can come from the following sources:

• superimposed moving loads, including machine vibrations in fixed structures ;

• loads due to exposure conditions, such as wind, swell, etc. ;

• acceleration forces in moving structures ;

• dynamic response due to resonance effects ;

• temperature variations.

Fatigue loads are generally defined in the various parts of Eurocode 1 :

• NF EN 1991-1-4 for wind ;...