Calculations and seismic vulnerability analysis have been made on the arched railway masonry bridge on Chiavenna torrent, of the railway line Bologna-Milano, in order to formulate the opinion about the seismic vulnerability assessment Ante Operam thereof. 
The analysed item is an arched railway bridge in Cadeo municipality, in Piacenza district. 
The seismic vulnerability is defined as the propensity of items to undergo changes as a result of the earthquake.
This measure allows to evaluate, together with the seismic exposition and danger, the seismic vulnerability of a site. 
The arched railway bridge analysed is a masonry infrastructure with two spans, with full brick arched masonry decks. The lowered arch is in masonry, the height from the ground level is about 6.30 m at the centre of the vault. 
The central pylon is completely in the river-bed, that has a cemented bottom.
Through scrupulous engineering analysis, realized with the help of exceptional analysis and modelling software, it is possible to conclude that the railway bridge analysed is suitable to support seismic actions defined by NTC 2018, because it presents the minimum risk index major to 1.00.

Client: Italian Railway Network (RFI) 
Consultant: INEA