Strain sensing and damage detection in the famous University Bridge
After seven years of operation, the University Bridge in Bydgoszcz became famous because of its structural failure. Significant deformations of the steel anchorage plates beyond the elastic range were identified. All the cables were relieved and then prestressed again after strengthening. Nerve- Sensors were used to monitor this process and identify the safety-critical areas most probable to yield. Now, this unique and essential to the city bridge came back to regular operation.
DFOS Sensors Installed: Optical fibre in acrylate coating
Project challenges
Benefits of using the DFOS monitoring system
Results of using the DFOS monitoring system
DFOS sensors were glued to the steel anchorages using two-component epoxy. The cables suspended to the unique pylons (A-shaped and Ω-shaped) were relieved and prestressed again after strengthening. Nerve-Sensors were used to control this process in a very detailed way. Thanks to high-spatial resolution strain measurements, identifying local and safety-critical areas (susceptible to yielding) was possible.
DFOS measurements provided reliable data for the expertise and calibration of 3D finite element models. The installed sensor system can be successfully used for long-term structural health monitoring.
DFOS measurements provided reliable data for the expertise and calibration of 3D finite element models. The installed sensor system can be successfully used for long-term structural health monitoring.
Example results
Recomendations (optional)
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John Doe
Project partner
