Estimation of Structure-Borne Noise Reduction Effect of Steel Railway Bridge Equipped with Floating Ladder Track and Floating Reinforced-Concrete Deck

• Published in: Journal of Mechanical Systems for Transportation and Logistics Vol. 3; no. 1; pp. 83 - 91
• Main Authors: WATANABE, Tsutomu, SOGABE, Masamichi, ASANUMA, Kiyoshi, WAKUI, Hajime
• Format: Journal Article
• Language: English
• Published: The Japan Society of Mechanical Engineers 2010
• Subjects: Floating Ladder Track; Floating Reinforced-Concrete Deck; Resilient Material; Steel Railway Bridge; Structure-Borne Noise
• ISSN: 1882-1782; 1882-1782
• DOI: 10.1299/jmtl.3.83

A number of steel railway bridges have been constructed in Japan. Thin steel members used for the bridges easily tend to vibrate and generate structure-borne noise. Accordingly, the number of constructions of steel railway bridges tends to decrease in the urban areas from a viewpoint of environmental preservation. Then, as a countermeasure against structure-borne noise generated from steel railway bridges, we have developed a new type of the steel railway bridge equipped with a floating-ladder track and a floating reinforced-concrete (RC) deck. As a result of train-running experiment, it became apparent that the new steel railway bridge installed by double floating system has reduced a vibration velocity level by 10.5 dB(A) at main girder web as compared with a steel railway bridge installed by directly fastened track. This reduction effect was achieved by the ladder track and RC deck supported by resilient materials.