2009 Volume 55A Pages 736-745
In a deck type arch bridge,very big up-lift forces for bearing supports and section forces beyond yield stresses occur in many members during a large earthquake. Therefore, an effective seismic retrofit design using damper is proposed to reduce dynamic response. For a target spandrel braced arch bridge with 214m span length, we improved an analysis model to a model with the meaning of damage process of bearing. Furthermore, three effective plans are put together to make one superior plan. In evaluation of seismic safety of each member, importance of the member and mechanism of the damage are considered.
