FULL-SCALE SOUND DAMPING TESTS ON TWO STEEL BOX GIRDER RAILWAY BRIDGES

SCHALLDAEMPFUNGSGROFVERSUCH AN ZWEI STAEHLERNEN EISENBAHN--HOLHKASTENBRUECKEN

This paper presents full-scale structure-borne sound damping tests on two steel box girder railway bridges of the Hamburg S-Bahn network, using three-layer sandwich plates as the sound-damping material. The highly damped layers were of vinyl acetate copolymer of about 1 mm thickness (bridge I) and a two component material based on polyurethane of the same thickness as the constraining steel sheets (bridge II). In both cases the thickness of the noncarrying sheets was about 1/4 of the base plate thickness. The bridges, both with direct fixation of rail, were built in 1959. The sandwich plates were applied in two steps in 1976. Noise measurements were made before, between and after application of the sandwich plates. The decrease in the mean values of the sound pressure level was 13 dB (bridge I) and 18 dB (bridge II), measured for a full train passing at 40 km/h. The structure-borne sound decreased by 17 dB and 19 dB, respectively. Damped by three-layer sandwich plates against structure-borne sound the box girder bridges radiated nearly the same noise while a train passed by as the railway tracks behind the bridges.

  • Corporate Authors:

    Ernst (Wilhelm) and Sohn

    Hohenzollerdamm 70
    1000 Berlin 31,   Germany 
  • Authors:
    • Hanel, J J
    • Seeger, T
  • Publication Date: 1978-12

Language

  • German

Media Info

  • Features: References;
  • Pagination: p. 353-361
  • Serial:
    • Stahlbau
    • Volume: 47
    • Issue Number: 12
    • Publisher: Ernst (Wilhelm) and Sohn

Subject/Index Terms

Filing Info

  • Accession Number: 00195707
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jul 31 1979 12:00AM