ABSTRACT
At the stage of preliminary design of a highway bridge with bridge length of 93 meters, a continuous girder with three-span is preferable from viewpoint of construction cost. In this situation, it is worried about that girder bridges with span length of thirty meters have large traffic-induced vibration because of simultaneous dynamic response with heavy vehicles. Furthermore large traffic-induced vibration of girder bridges causes low frequency sound (LFS) as one of environmental vibration problems. To avoid the possible occurrence of LFS, the continuous girders with different span length distribution and girder height are considered. At the first step, traffic-induced vibrations of the girder bridges are compared each other analyzing coupling dynamic response of bridges due to moving heavy vehicles. And then, LFS radiated from the girder bridges are evaluated and compared.
