Making road traffic bridges silent
Regular paper
Movares
Tuesday 2 june, 2015, 10:40 - 11:00
0.2 Berlin (90)
Abstract:
The noise of road traffic bridges can be nuisance, especially nearby in the low
frequency range. There are no noise regulations, but for new bridges and in
case of renovation, the Dutch traffic authority wants to reduce the noise and
construct a “Silent Bridge”. As a start of this project noise and vibration
measurements were performed on a traffic bridge before and after the renovation
of the steel bridge. Also a FEM BEM model of this bridge for and after
renovation was build, to calculate the expected noise emission and for
engineering towards a silent bridge. Comparing the FEM BEM calculations with the
noise and vibration measurements lead to validation of the design process. The
analyses lead to adjustments in the force excitation model used in the FEM-BEM
approach and to a better prediction of the sound radiation. coefficient and
adjusting this coefficient for further studies.. As a result of this study, more
design tools can be given now to come to a silent traffic bridge. Engineering
protocols for design, calculation and measurements were formulated to help other
parties to build a silent steel bridge.