Inelastic behavior of reinforced concrete structure with tuned mass damper

The application of energy dissipation devices to control the influence of earthquake loads on the structures suggests an attractive alternative to traditional earthquake resistance design methods. In this study, the efficiency of using tune mass dampers (TMDs) to enhance the earthquake performance of an existing reinforced concrete (RC) building was investigated comparatively. To this aim, an eight story RC building having the same height of 3 m at each story level and three equal bay spacing of 5 m in both directions was designed as a moment resisting frame building. The dimension of the columns varied for each story while that of the beams were considered as 60x25 cm at all stories. The TMD system was modeled by means of two plates indicating shell elements and 13 link elements, nine linear springs and 4 viscous dampers. They were placed at roof level of the building. The nonlinear dynamic analysis was performed for the case study RC building before and after applying TMDs. The time history of displacement, drift, bending moment, and acceleration as well as the distribution of drift over the story height and base shear versus roof displacement variation were evaluated and discussed. The analysis of the results indicated that the response of the RC structure positively improved by the inclusion of TMDs in the case of earthquakes. Keywords: Dynamic analysis, Earthquake, Nonlinear behavior, Reinforced concrete building, Tuned mass dampers.