Kalix river bridge (object state)
A condition of an object at a particular time, reflecting the object's ability to fulfil it's requirements.
Properties
Element type
:
Object state
Summary
:
The critical sections are in the beams carrying the rail on top of the arch in the section where the beams are united with the arch. Here the stresses in the longitudinal bottom reinforcement were slightly too high. These sections have been studied in a FEM model for different loads and results show maximum strains of about 50·10-6 corresponding to stresses of only about 10 MPa in the reinforcement in the critical sections. Live load vertical deflections of the crown of the arch are of the order of only ± 6 mm. Dynamic studies have also been made showing that fatigue is no issue. Altogether the studies show that the bridge can carry an increased axle load of 300 kN without problems.
Performance indicator
:
Deformation, Dynamic response (acceleration/damping/frequencies)
Inspection method
:
IoT and sensor systems
Relations with other elements
The inspection method used in this case study to determine the object state was "IoT and sensor systems". This can include any of the following surveying technologies. Click one of the links below for more information:
IoT and sensor systems