IF articles

Experimental analysis of the sound emissions generated by railway vehicle passage on new generation metallic bridges

 

The start of the operation on the new

railway bridge of Ostiglia (MN) crossing the river Po along

the railway line Bologna-Verona, allowed Italferr, the engineering

company of Ferrovie dello Stato, to carry out

some experimental tests aiming to verify the advantages

of the new construction typology in the field of the sound

emissions generated by the passage of the trains.

This bridge is composed of simply supported single

 

track metallic lattice girders (through arch upper-closure

girders), with theoretical spacing between supports of 64.4

m and 73.6 m. It is a ballasted-permanent way bridge and

its deck is composed of a reinforced mix continuous slab.

The monitored structural solution shows different innovative

characteristics if compared with the traditional

metallic lattice girders with non ballasted-permanent way;

one of these characteristics is a significant noise reduction.

This paper summarizes the most important aspects of

the considered test campaign with a particular attention

to comparisons between the sound emissions of the new

bridge crossing the river Po along the line BO-VR and the

corresponding emissions relevant to other non ballastedpermanent

way bridges. Further comparisons with other

structure typologies along the same line, such as embankments

and pre-compressed reinforced concrete decks,

were carried out too.

  • Gennaio
2011
Num. 1
Pag. 8