Seismic Fatigue risk assessment of mechanical components is required by the RCCM design code. This risk is evaluated by calculating a codified criterion named “Usage Factor” which represents the cumulated damage on a mechanical component submitted to stress/strain variation cycles during its entire life. When dealing with change of plant operating conditions, […]
Seismic Fatigue risk assessment of mechanical components is required by the RCCM design code. This risk is evaluated by calculating a codified criterion named “Usage Factor” which represents the cumulated damage on a mechanical component submitted to stress/strain variation cycles during its entire life. When dealing with change of plant operating conditions, the stress variation magnitudes and associated number of cycles are easy to define. Therefore, the calculation of cumulated fatigue damage is straightforward. However, the contribution of the seismic stress cycles in the Usage Factor calculation is less obvious to handle. First, this paper proposes accessible guidelines aiming at defining the seismic solicitation with regard to fatigue risk assessment. Then, a codified approach for the calculation of the Usage Factor accounting for specific RCCM design rules is proposed. Finally, the margins resulting from this codified approach are compared with margins resulting from a rainflow counting method.
Session
| Room | Date | Hour | Subject |
|---|---|---|---|
| Poster Session | 00:00-00:00 | Sandy Limouzi 23 - A pragmatic method to account for seismic stress cycles contribution in fatigue assessment compliant with RCCM French design code |
