In a first phase the instrumental diagnostic campaign have been planned and the detailed surveys of the entire work (geometry, structural construction details) began. In addition, through the instrumental diagnostic campaign, it was possible to define the properties of the structural materials and the soil of sediments, both through sampling and destructive testing, and through non-destructive checks on the materials. Thereafter, the dynamic characterization of the artifact under ambient vibration conditions was performed to determine the frequencies of the main modes of vibration of the bridge and access viaducts, associated with their modal deforms. A more detailed bridge model was developed, by which the Non-Linear Dynamic analysis was conducted.
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