PSI - Issue 64

Amedeo Caprino et al. / Procedia Structural Integrity 64 (2024) 2149–2156 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 5. Displacement trend of the most significant sensors for the left span (a), central span (c), right span (d). Correlation between displacement and temperature of the most significant sensors for the left span (b), central span (d), right span (f).

Fig. 6 shows the time trends of the first seven vibration frequencies for the observation period. It can be seen that the structure's own frequencies are quite stable in general with a slight fluctuation due to changes in environmental parameters (temperature and relative humidity). The variation of natural vibration frequencies related to the main vibration modes of the bridge does not show any anomalies during the observation period. It is possible to identify a marked correlation between frequency and temperature particularly on modes 2, 3, 5 and 6.