In this paper, to improve seismic performance of upper-deck type steel arch bridges against transvers directional earthquake motions, a method using two kinds of shear panel dampers installed at gusset plates of struts or arch ribs was proposed. Then dynamic analyses of a representative steel arch bridge with shear panel dampers were carried out and dynamic performance was compared with one of the original structure without dampers.
As a result, it was confirmed that this method was one of effective ways to upgrade seismic performance but the influence of the additional moment of struts and the stress concentration of joints should be estimated adequately.