Vibration characteristics change of a three span continuous steel box girder bridge on behalf of environmental changes of temperature and traffic vibration

Abstract

Vibration monitoring has been established as one of the major structural health diagnosis method with emerged soft and hard based measurement technologies. The method would be effective for the management of infrastructures to recognize the level of structural deterioration by change of natural frequency. On the other hand, there still exist some problems for the environmental effects such as temperature and/or traffic excitation. The authors investigated the tendency of the change of the vibration characteristics, caused by temperature change or traffic excitation by the measurements of an existing bridge. In this paper, results of the series of the measurement for a three span continuous steel box girder bridge with various sensors and simulation results are discussed.