Calibration of the FLM3 Fatigue Model
Assessment of existing bridges and road traffic loads

The FLM3 fatigue load model is intended for routine design checks without, if possible, any damage calculations using, for example, the Palmgren-Miner rule. It is based, on the one hand, on existing models in national standards and, on the other hand, on the design principles agreed upon for steel railway bridges.

The initial idea was to obtain a “fatigue train” such that, after a single run of the model along the bridge and after numerical adjustment with appropriate coefficients, a single stress variation could be calculated.