In past decades, several studies have been carried out to improve the ductility of brace elements. One of the most acceptable method is utilizing yielding ring dampers to braces. Results of studies have clarified the positive effect of implementing the ring dampers to postpone the buckling of braces. Design forces and displacement limit of dampers are considered based on Design Based Earthquake level, although they subjected to moderate earthquakes more frequently.
In this study, a new hybrid damper is proposed to combine the friction and yielding ring damper to control the response of structures in two different level of earthquake, separately. In moderate earthquakes, friction damper justifies the seismic response of structure without engaging the yielding part and in severe earthquakes (with high displacement demand), yielding part controls the seismic response of structure.
In order to evaluate the cyclic behavior of new hybrid damper, 3 component experimental samples have been proposed and experimented under monotonic and cyclic loading.
Results of analysis under cyclic loads, indicates the two distinct performance level in force-displacement curve. Stable behavior of ring damper due to auxiliary friction damper have been reached