There are many passive energy dissipating devices designed to dissipate earthquake energy in a structure. Metallic yielding dampers is one of these devices which are very efficient as they dissipate seismic input energy through hysteretic behavior. This research used ETABS software to analyze the performance of three metallic yielding dampers; X-shaped damper, Double X-Shaped and Comb Teeth Damper. The storey response data obtained from the analysis is storey shear. Each damper has three types of material; A992 steel, A36 steel and Aluminium. Concentrically braced steel frames with Chevron bracing were used and the dampers were placed in brace to beam orientation in each frame. The two types of frames analyzed were; low rise building with five storeys and a high rise building with twenty storeys. The site locations for both structures were in the region of California in the United States of America. The structures were analyzed by subjecting them to two earthquakes Loma Prieta and San Fernando as they were two of the major earthquakes that struck California in the nineties.
Metallic yielding dampers are passive energy dissipating devices that are designed to disperse earthquake energy through hysteretic behavior. This research used ETABS software to analyze the performance of two metallic yielding dampers of the type Added damping and Stiffness (ADAS); X-shaped damper and Double X-Shaped damper. The story shear response of two frames, one a low-rise building of five stories, and another high-rise building of 20 stories was analyzed. Each damper had three types of material; A992 steel, A36 steel and aluminium. The site location for both structures were in the region of California in the United States of America. The structures were analyzed by subjecting them to two earthquakes Loma Prieta and San Fernando as they were two of the major earthquakes that struck California in the nineties. The results showed that both dampers performed satisfactorily. But their performance depended on the magnitude of the earthquake and the number of stories of the structure. Dampers that were made of steel performed better than the ones made of aluminium. Both X-shaped and Double X-shaped dampers were concluded as good energy dissipating devices according to the results obtained.
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