Analysis of the vibration alleviation of a new railway sub-ballast layer with waste tyre rubber

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• 作者：Carlos Hidalgo Signes ; Pablo Martínez Fernández…
• 关键词：Railways ; Sub ; ballast ; Waste tyres ; Rubber–aggregate mix ; Vibration alleviation
• 刊名：Materials and Structures
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：50
• 期：2
• 全文大小：2,500 KB
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Theoretical and Applied Mechanics
  Mechanical Engineering
  Operating Procedures and Materials Treatment
  Civil Engineering
  Building Materials
  
• 出版者：Springer Netherlands
• ISSN：1871-6873
• 卷排序：50

文摘

This paper focuses on the assessment of the vibration behaviour of granular sub-ballast materials mixed with rubber particles from scrap tyres. The main objective is to evaluate whether these mixes attenuate vibrations caused by passing trains, and if so, to what extent. Several laboratory and field tests were carried out to monitor the response of such materials to various excitation sources. The results show that under controlled laboratory conditions, the addition of rubber (up to 5 % by weight) greatly increases the damping ratio and reduces vibration. Field tests also show that higher percentages of rubber yield a significant alleviation of vibration caused by repetitive and harmonic loads that are similar to those produced by passing trains. An addition of 5 % by weight yields a reduction of 50 % in the mean acceleration peak at 1 m from the excitation source. The anisotropy of the mix is another key factor when evaluating the vibration behaviour of these mixes.