numerical evaluation of multi level ring damper

In this paper, a new type of dual-performance passive dissipating devices called tryd (three ring yielding damper) is introduced as alternatives to the available yielding ring dampers (andalib et al., 2018). modified types of the conventional ring dampers are detailed and designed to absorb and dissipate seismic input energy at different levels of ground motionintensities. proposed system is composed of a main fuse to dissipate energy at high-level drift demands occurred in severe earthquakes and an auxiliary fuse to control the responses at lower drift demands normally occurred in moderate earthquakes. the hybrid damper is basically a displacement-dependent device which dissipates seismic energy byyielding of outer and inner rings. the yielding of outer ring occurs at small displacement, which makes it effective in resisting small earthquakes. the inner rings (main fuse) remain elastic during small earthquakes and are activated at major earthquakes.