Abstract
This paper describes a numerical result to clarify the effectiveness of the rubber type restrainer to mitigate pounding effect between adjacent decks. A series of nonlinear dynamic analysis was conducted for two structural system consisting of 5 spans continuous bridge subjected to an extreme ground motion. It is found from the analysis that effect of the restrainers is significant in deck response and plastic curvature at pier bottoms. It is also found that effect of the energy dissipation in the restrainer is limited because of the small contribution to the total energy dissipation. The effect of the skeleton curve of the restrainer between the strain hardening and strain softening is also studied. It is found that the strain hardening type restrainer is favorable in limiting deck response in both bridges.
