NOISE FROM STEEL RAILWAY BRIDGES: A SYSTEMATIC INVESTIGATION ON METHODS FOR SOUND REDUCTION

✍ Scribed by T. Odebrant

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 229 KB
• Volume: 193
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1996.0262

✦ Synopsis

Two different methods to reduce the air-borne sound and two methods to reduce the structure-borne sound from a steel bridge were investigated: the high screening girder was provided with a sound absorber on the side facing the trains; all openings between and around the sleepers were filled with a covering consisting of 50 mm thick plank; the track was vibration isolated; and the steel was damped. To reach the goal of lowering the sound level by 10 dB(A), a combination of measures was found necessary: isolation of structure-borne sound by pads under the sleepers; and covering of the lower parts of the bridge (an alternative could be to place hanging sound absorbing baffles between the girders under the bridge, to simplify maintenance and removal of snow from the bridge).