Innovative Suspended Superstructure for the Retrofitting of a Steel Truss Railway Bridge

The bridge in Poggio Renatico crossing the Reno river on the railway line between Bologna and Ferrara, consists of steel decks supported by masonry abutments and piers, while foundations and pier caps are made of reinforced concrete. After the 2012 Emilia Earthquake and accounting for the fluvial er...

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Bibliographic Details
Published in:Key engineering materials 2018-02, Vol.763, p.1121-1128
Main Authors: Petrella, Paolo, Nestovito, Gianluca, Mezzi, Marco, Cefaliello, Vincenzo
Format: Article
Language:English
Subjects:
Bridge abutments
Bridge foundations
Cables
Decks
Erosion
Girders
Maintenance costs
Masonry
Piers
Rail transportation
Railway bridges
Railway construction
Railway networks
Railways
Reinforced concrete
Reinforcing steels
Retrofitting
Solution strengthening
Steel decks
Steel structures
Superstructures
Suspension systems
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Summary:The bridge in Poggio Renatico crossing the Reno river on the railway line between Bologna and Ferrara, consists of steel decks supported by masonry abutments and piers, while foundations and pier caps are made of reinforced concrete. After the 2012 Emilia Earthquake and accounting for the fluvial erosion below the piers foundations, a structural assessment of the bridge was carried out in accordance with to the current Italian rules. Although a sufficient structure capacity against the actual transit loads resulted, the bridge showed some inadequacies with respect to the load models provided by both the national standard for constructions and the guidelines of the Italian railway network company. The retrofitting project consists of an improvement of the structural capacity of all the elements: girders, piers and abutments. An innovative retrofitting solution provides for the strengthening of the existing decks through a suspension system of cables anchored to steel towers standing on both abutments and piers and creating a kind of suspended bridge. The retrofitting is compatible with the normal scheduled interruptions of the rail traffic thereby reducing the maintenance costs of the railway system. The structural solution represents a model easily replicable to solve analogous situations along the railway network.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.763.1121