For the railway bridge Heugasse, located at the track Vienna – Spielfeld a simple approach for identifying the dynamic response of the structure in operational conditions should be evaluated. In particular the eigenfrequencies and modes in ambient and loaded condition are desired, moreover estimates for the deflection caused by the traffic-load as well as damping coefficients should be derived. This measurements are contributing to a pilot project for future monitoring concepts. Therefore several measurement points and different sensing technologies have been used in order to identify the equipment which is suited best for fast and reliable testing under operational conditions.

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