Sound emission comparisons between the box-section and U-section concrete viaducts for elevated railway

Viaduct structures are widely used for the elevated lines in Shanghai Metro Light Rail System. There are two kinds of concrete viaduct, the box-section and U-section structure. In this work the structure-borne sound is predicted and measured in-situ for the two viaduct structures during the train passage. The vehicle-track interaction due to a relative displacement excitation is simu¬lated. The forces in the rail pads are calculated and used as the excitation to the viaduct. The structural vibration and sound emission are predicted and measured. Comparisons are made between the two viaduct structures based on the results of predictions and in-situ measurements.