Authors : Min-Ho Chey, Seong-Il Kim and Hyung-Jin Mun
Abstract: This study explores the effectiveness of a passive Tuned Mass Damper (TMD) system as a seismic damping strategy to suppress structural vibrations for reinforced concrete structure. The optimised TMD parameters or a curve-fitting scheme has been employed subjected to a series of earthquake excitations. The response performance of the target structures and the TMD used are examined and the effectiveness of the TMD is presented. As for the optimum parameters with respect to displacement, the optimum frequency tuning ratio increases and the optimum TMD damping ratio decreases with increasing mass ratio. For a given level of critical damping in the structure increasing the mass ratio makes the TMD more effective in reducing structural response. Despite of the some uncertainty due to the effectiveness of the TMD for the individual earthquakes, a suggested optimum TMD system reduces the inter-storey drifts clearly, especially for the earthquake records having large spectral displacements. From the viewpoint of the Root-Mean-Square (RMS), values for the some earthquake motions used, the RMS stroke lengths of the TMDs are relatively larger than under the other excitations and this response property of the TMDs corresponds to larger displacement of the corresponding top floors. Thus, it can be noted that the TMD stroke increases as the top floor displacement increases. As the response of the structure (top floor response) is increased, the corresponding TMD response is increased with regard to TMD stroke.
Min-Ho Chey, Seong-Il Kim and Hyung-Jin Mun, 2017. Structural Control Strategy of using Optimum Tuned Mass Damper System for Reinforced Concrete Framed Structure. Journal of Engineering and Applied Sciences, 12: 7038-7045.