Reducing Traffic-induced Vibration of a Steel Truss Bridge by means of No-joint Method
Naomi NAMATAME, Chul-Woo KIM, Akihide HATANAKA, Mitsuo KAWATANI
This paper presents an investigation for reducing traffic-induced vibration of a steel truss bridge by means of the no-joint method which renders bumps on expansion joints of bridges to be flat and, as a result, reduces the impulsive energy generated from vehicles. In this study, effectiveness of the no-joint method as a countermeasure against the vibration radiated from joints is confirmed through out dynamic response analyses under a moving vehicle. The successful reduction of the vibration between 10Hz and 20Hz observed from the analytical investigation encourages the use of the no-joint method to an actual steel truss bridge. The experimental investigation by comparing the responses before and after the no-joint method demonstrates effectiveness of the method even under usual traffic condition.