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Fatigue verification for reinforcing and prestressing steel: the value of γF,fat and the parameters for S-N curves

Eurocode 2 part 1-1: Design of concrete structures   6.8.4 (1)

The damage of a single stress range Δσ may be determined by using the corresponding S-N curves (Figure 6.30) for reinforcing and prestressing steel. The applied load should be multiplied by γF,fat. The resisting stress range at N* cycles ΔσRsk obtained should be devided by the safety factor γS,fat.


The value of γF,fat for fatigue verification is given in § (1).

The recommended values of parameters for S-N curves for fatigue verification are given in Table 6.3N (reinforcing steel) and 6.4N (prestressing steel).

National choice

The values of parameters for S-N curves