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http://dx.doi.org/10.12989/acc.2022.13.4.339

Experimental and numerical investigation on RC moment-Resisting frames retrofitted with NSD yielding dampers  

Esfandiari, J. (Department of Civil Engineering, Kermanshah Branch, Islamic Azad University)
Zangeneh, E. (Department of Civil Engineering, Kermanshah Branch, Islamic Azad University)
Esfandiari, S. (Departments of Civil Engineering, RWTH Aachen University)
Publication Information
Advances in concrete construction / v.13, no.4, 2022 , pp. 339-347 More about this Journal
Abstract
Retrofitting in reinforced concrete structures has been one of the most important research topics in recent years. There are several methods for retrofitting RC moment-resisting frames. the most important of which is the use of steel bracing systems with yielding dampers. With a proper design of yielding dampers, the stiffness of RC frame systems can be increased to the required extent so that the ductility of the structure is not significantly reduced. In the present study, two experimental samples of a one-third scale RC moment-resisting frame were loaded in the laboratory. In these experiments, the retrofitting effect of RC frames was investigated using Non-uniform Slit Dampers (NSDs). Based on the experimental results of the samples, seismic parameters, i.e., stiffness, ductility, ultimate strength, strength reduction coefficient, and energy dissipation capacity, were compared. The results demonstrated that the retrofitted frame had very significant growth in terms of stiffness, ultimate strength, and energy dissipation capacity. Although the strength reduction factor and ductility decreased in the retrofitted sample. In general, the behavior of the frame with NSDs was evaluated better than the bare frame.
Keywords
experimental assessment; Non-uniform Slit yielding Dampers (NSDs); RC moment-resisting frame; retrofitting; seismic parameters; yielding dampers;
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Times Cited By KSCI : 6  (Citation Analysis)
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