Description
The purpose of this study is to demonstrate the impacts of friction dampers (FD) or fluid viscous dampers (FVD) in irregular in plan and in elevation reinforced concrete buildings. The buildings (a four-story building, a nine-story building, and a twenty-story skyscraper) were analyzed using nonlinear dynamic time-history analysis on earthquake recorded accelerograms, three of which were real while the other four were artificial. For this purpose, 70 nonlinear dynamic analyses were carried out. This paper describes the optimal design of fluid viscous and friction dampers, with a focus on minimizing the following parameters: (i) maximum displacement (top of the structures), (ii) building torsion, (iii) maximum horizontal interstory drift. Two different placement of the dampers have been studied in each building. The consequences of each strengthening method are shown, and other relevant results were obtained from this creative comparison (optimal design, two passive energy systems, and three different story numbers). The comparable results show that in low-rise structures, FD were more successful than FVD for reducing torsional moment; however, in medium and high-rise buildings, VDF were more effective at improving the seismic performance of the structures.
