抄録
Rayleigh damping is usually employed in conducting the dynamic response analysis of the bridges. However, Rayleigh damping is not always based on the structural damping mechanism. In this paper, the modal damping ratios of the practical viaduct with 6 spans based on Rayleigh damping are compared with the ones obtained from the proposed method by authors in Ref.20). In this case, the several damping models of the foundation part of the viaduct are also examined in applying the proposed damping model which is constructed on the basis of the damping factor of the structural element. The effect of the damping factor of each structural element on the modal damping ratio of the viaduct is investigated through this research.
