Railway Plate Girder Bridges as a Source of Noise: Examples Selected

3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium

土木建筑工程;文学

Janas, Lucjan^1

Rzeszow University of Technology, al. Powstancow Warszawy 12, Rzeszow

35-959, Poland^1

关键词: Bridge structures;    Deck structures;    Investment projects;    Noise emissions;    Point-to-point contact;    Source of noise;    Standard elements;    Structure elements;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/471/5/052014/pdf
DOI  :  10.1088/1757-899X/471/5/052014

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

This paper presents the results of research of noise in the surrounding of three plate girder railway bridges of different type of deck structure. One of the objects has a track fixed directly to steel plate of the deck, next object has a deck in form of an open grid. The last of the objects is a bridge, where the track was laid on ballast. Sources of noise in these bridges were identified. Reasons for an increase of noise when a train crosses the bridges can be generally divided into two groups: a) vibrations coming from wheels transmitted through rails to a bridge structure, make its components vibrate; structure elements with large surface may act as membranes of a loudspeaker and emit unwanted sounds; b) in bridges with an open deck the lack of insulation makes the sounds at point-to-point contact of wheels with rails disseminate. The biggest threat to the environment from the noise emission point of view is caused by steel bridges with an open deck and with a steel deck with no ballast. The noise next to the track beyond the bridge depends mostly on the type of train, its speed and wheels condition. The noise under the bridge was almost 15 dB higher than the noise nearby the track beyond the bridge. The level of noise next to the bridge was higher 3.3 to 10 dB. Nowadays, the analysis of railway bridges for the emission of sounds should be the standard element in the process of preparation and design of investment projects.