Rini Kusumawardani, - Vibration Analysis on a Railway Bridge Structure. Lecture Notes in Civil Engineering..

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Abstract

The railway bridge would be vibrating when a series of train passed on it. The movement a train triggers a noise to the bridge structure which is generated by the combination of small-scales undulation between wheel of train, railway and bridge railway contact surfaces. Nowadays, railway researches focused on dynamic behaviour of railway track when the train passed on it. This study discusses the dynamic behaviour of railway bridges vibrations caused by train traffic load in terms of three axis direction (x, y and z direction). A field investigation was conducted by applied a series of accelerometers to find out the value of frequency natural and amplitude. The tools are placed on the beam at a half span and at a third span. The results were compared between passengers train and carriage train. During unloaded condition, the range of frequency natural is 0.78–3.73 Hz and amplitude is in between 1.82 and 1.89. When the train passes by, the range of frequency natural is in between 1.03 and 5.77 Hz and amplitude 1.70–4.

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