A new metallic bar damper device for seismic energy dissipation of civil structures

摘要

This paper presents a new type of hysteretic metallic damper device, named bar damper (BD). BD is mainly made of three simple steel parts that includes top and bottom steel plates and a number of solid bars which dissipate input energy due to vibration loads through flexural yielding. Despite the simplicity of the damper, an optimized geometry of the plates as well as the solid bars can be suggested to guarantee uniform stress and strain distribution. Three full-scale device specimens have been made to be tested under cyclic displacement. The obtain results from the tested specimens have revealed a significant cumulative displacement extracted from the hysteresis loops with no substantial strength degradation.