226 高架橋の走行車両による振動の解析

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  • 226 Vibration Analysis of Elevated Bridges Subjected to Moving Load

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Elevated bridges supported by rubber bearings vibrate due to heavy moving vehicles, emitting heavy impact sounds around the joints. In this study, the vibrations of beams equivalent to the elevated bridges are analyzed, taking the elasticity of rubber bearings into account. The results shows that the end of the elevated bridge is more likely to vibrate than any other positions because higher modes, which are anti-node at both ends, are mainly excited, and the vibration at the ends of the elevated bridges causes impact low-frequency noise.

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