Abstract
In this study, the performance of rectangular added damping and stiffness (RADAS) dampers has been introduced in the diagonal element site to avoid brace buckling and energy dissipation by dampers. The innovation of this research is in the type of site of steel plates and the way of connection in the vicinity of gusset plates which can be easily replaced. To investigate the cyclic performance of the ADAS damper, 15 numerical examples have been simulated by ABAQUS software. The study of cyclic behavior on the single-bay and single-floor steel frame has been done, and the sensitivity of cyclic behavior based on the thickness, length and ratio of dimension to the thickness has been studied. The studied thicknesses of the damper were 12, 21 and 30 mm, the studied lengths of the damper were 400, 500 and 600 mm, the studied geometry of the damper was rectangular, and the studied thicknesses of the brace were 12, 21 and 30 mm. The results of this study showed that this type of damper has good behavior in the energy dissipation of the frame and the total stiffness of the steel plates forming ADAS dampers must be less than the stiffness of the brace to show acceptable frame performance. By changing the damper length parameter from 600 to 500 and 400 mm, each of the indicators of stiffness, ultimate strength and energy has increased by a maximum of 144, 46 and 149%, by changing the damper thickness parameter from 12 to 21 and 30 mm, each of the mentioned indices has increased by a maximum of 147, 52 and 160%, and by changing the brace thickness parameter from 12 to 21 and 30 mm, each of the mentioned indices has increased by a maximum of 5, 7 and 9 percent. The values of the damper thickness and length, when they are less stiff than the stiffness of the brace, cause the plastic hinge formation to be made on the damper, and the damper performance is optimized.
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Yousefi, M., Nassira, Y. & Ghamari, A. Performance of a New Model of Rectangular Damper in Diagonal Concentric Brace. Iran J Sci Technol Trans Civ Eng 46, 2235–2248 (2022). https://doi.org/10.1007/s40996-021-00624-9
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DOI: https://doi.org/10.1007/s40996-021-00624-9