Eisenbahnbrücke Eglisau (analysis)
A detailed assessment of the condition of an object.
Properties
Element type
:
Analysis
Summary
:
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
:
Research
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