PSI - Issue 62

Valentina Giglioni et al. / Procedia Structural Integrity 62 (2024) 887–894 Giglioni et al. / Structural Integrity Procedia 00 (2019) 000–000

890

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on B4 (Fig. 2a), in which an additional woven cotton sheet is attached on the aluminium deck using a heat fusible adhesive and afterwards employed to create a freezable water layer. In particular, the healthy dataset includes measurements during ambient temperature and under changing environmental conditions. Firstly, data labelled with “N” are collected (i) by considering ambient temperature and (ii) by decreasing the temperature to -15°C and returning it back to the starting value.

Fig. 2. (a) panoramic view of B4 bridge configuration; (b) scheme of the bridge deck, including the position of A1-A20 accelerometers and the additional masses; (c) particular of the deck and the pier; (d) location of the accelerometers A21 and A22.

Then, the woven cotton sheet on the deck surface is sprayed with water and accelerations are consequently gained within the same ranges of temperatures to reproduce the waterlogged (W) scenario, including freezing effects.

Table 1. Bridge configurations.

Configuration

Deck length [m]

Pier 1 [m]

Pier 2 [m]

Pier 3 [m]

Pier 4 [m]

B1 B2 B3 B4

2.99 2.99 2.99 2.99

0.14 0.14 0.14 0.14

0.855 0.815 None 0.725

2.145 2.185 2.185 2.275

2.86 2.86 2.86

2.86 To simulate damage conditions in each configuration, specific masses are applied at ambient temperature to reduce the stiffness at /2 and /2 , being and the length of the main and lateral spans. In addition, the