2005 Volume 2005 Issue 787 Pages 787_105-787_115
Bridges are mainly made of two types plate component, slab and girder. Such components are vibrated by road traffic, and radiate structure borne sound. In this paper calculation methods for the structure borne sound are derived by the theory of thin plate vibration. Test-run of heavy trucks on different type bridges and vibration force measurement with hammer impact on bridge surface are carried out. From those tests the vibration force caused by traffic is estimated. With the aid of the vibration force and the calculation formulas, the radiated sound is calculated. Also we compared the calculated results with measured sound and could explain the sound field with this method. It is shown that a good agreement is obtained between the theoretically predicted value and the measured one.
