Finite element updating
Herein, its effectiveness is validated through the fatigue assessment of a lively footbridge considering two different numerical models: (i) a preliminary finite element (FE) model and (ii) an updated version of the preliminary model based on the modal parameters of the footbridge identified experimentally.
Finally, a comparison is performed between the fatigue damage of some cables of the footbridge considering the two mentioned FE models.
The safe life method was used to assess such damage.
The relationship between the macro-strain and local element stiffness was studied first.
It is revealed that the macro-strain is inversely proportional to the local stiffness covered by the long-gauge strain sensor.