DYNAMIC MONITORING AND IDENTIFICATION OF A NEW ITALIAN CABLE-STAYED BRIDGE DURING DYNAMIC LOAD TESTS

The new cable-stayed bridge built for the North-South axis road of Bari in order to overpass the railway of RFI and Ferrotramviaria s.p.a. has been recently built and opened to the traffic. The bridge is 626 m long and the central cable-stayed bays have a total length of 225 m. They are supported by 30 cables connected to a central upside down Y-shaped pylon that is about 60 rotated with respect to the axis of the bridge deck. The cables-stayed bays have been identified by 26 piezoelectric accelerometers to record the accelerations produced by environmental forces and by the impact produced by a loaded truck of about 38 tons passing over a bump. Operational Modal Analysis (OMA) has been applied to determine the first frequencies, mode shapes and damping factors.