STUDY ON NOISE VIBRATION MEASURES FOR STEEL RAILWAY BRIDGES

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  • 鋼鉄道橋に用いる騒音振動対策に関する研究

Abstract

<p>Steel railway bridges are said to be inferior to concrete bridges in noise and vibration. Although the vibration damping material is used as a countermeasure for the web plate, the vibration damping material measures have restrictions in the use range. In addition, the vibration damping material often does not match the reduction effect of the vibration of the steel plate and the vibration radiation noise, and the reduction effect by the vibration damping material installation cannot be grasped correctly. Therefore, in this research, we proposed a method to evaluate the countermeasure effect based on particle velocity, and verified the validity of this evaluation method. Furthermore, we proposed a countermeasure using polymer cement mortar (PCM) with no restriction on the place where it can be installed. Based on the particle velocity and vibration velocity obtained by the test, it was verified that the two are equivalent in performance by comparing the reduction effect of the PCM and the damping material. In addition, it was confirmed that the reduction effect of PCM can be grasped by analysis by comparing the reduction effect of vibration velocity obtained by analysis with the test result.</p>

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