Eisenbahnbrücke Eglisau (analysis)

A detailed assessment of the condition of an object.


Element type
A fatigue assessment was carried out by using monitoring data of strain at critical details, along with historic traffic records and future expected change in traffic loading. The fatigue analysis was done in two steps, first a fatigue limit verification and if exceeded, a Palmgren-Miner damage accumulation verification. Instead of applying partial safety factors, the safety criterion was set to damage value 0.5, where damage value 1 corresponds to failure. It was concluded that the fatigue reliability is sufficient for the next 50 years. The most critical detail was identified to be the first diagonals closest to the supports, and by rehabilitating these elements the fatigue life can be further elongated. The analysis was carried out according to the Swiss standards for assessment of existing structures from 2011.
Case type
Initiation of assessment
Anticipated change of design working life
Predominant verification type
Design value criteria
Predominant verification scale
Structural component
Structural analysis
Fatigue limit state
Information updating
Direct non-bayesian
Physical intervention
Strengthening or upgrading

Relations with other elements