ABSTRACT
Three pedestrian and bicycle bridges made from a fully recyclable bio-composite material are developed in the context of the Interreg NWE Smart Circular Bridge (SCB) project. These bridges incorporate Structural Health Monitoring (SHM) technology to assess their structural integrity and provide data for future designs. The SHM setup includes strain, vibration and environmental sensors. This paper focuses on the 90 strain and temperature sensors in the first circular bridge. The data shows a strong temperature dependency of the strain, which is addressed using a temperature compensation strategy. Traditional polynomial temperature compensation is compared to a strategy using the Savitsky-Golay filter, the latter removes almost all temperature variability in the data. The strain sensors are also used to capture the bridge dynamics, accurately tracking the first vertical mode, using DBSCAN for automated tracking. The large number of sensors allows for the tracking of the mode shape for potential damage detection.
