DAMPER DEVICE FOR STRUCTURAL EARTHQUAKE STRENGTHENING

摘要

PROBLEM TO BE SOLVED: To provide a damper device for structural earthquake strengthening which: can fulfill a uniform and stable vibration control function regardless of a direction of an earthquake load; has a simple structure; is small in size; facilitates maintenance; fulfills the stable vibration control function for a long period of time; and can be installed in a narrow space.SOLUTION: A damper device 10 for structural earthquake strengthening comprises: a lower end face plate 1 which is installed on a substructure 30; a shear member 2 with one end face thereof fixed to the lower end face plate 1; an upper end face plate 3 which is fixed to the other end face of the shear member 2 and parallel to the lower end face plate 1; and a reaction member 4 which is installed on a superstructure 40. When the lower end face plate 1 is horizontally installed on the substructure 30 and the reaction member 4 is horizontally installed on the superstructure 40, an inner peripheral surface of the reaction member 4 surrounds an outer peripheral surface of the upper end face plate 3 with a gap in between.