Akademik Veri Yönetim Sistemi
World Conference on Earthquake Engineering proceedings, International Association for Earthquake Engineering, 2024
Tuned mass dampers (TMDs) with different parameters are available to reduce seismic vibrations in structures. If the tuned mass dampers (TMDs) are designed correctly, they contribute significantly to the behavior of the structure by reducing the vibration of the structure. In this study, a pendulum type tuned mass damper (PTMD), which is a tuned mass damper type, was experimentally investigated under the influence of different ground motions. Harmonic and shaking table experiments on the reduced three-storey model, which represents a real three-storey building, were carried out under the influence of three different earthquakes. The harmonic loads used in this research, on the other hand, have a constant amplitude and frequency in the resonance state of the structure. The other three earthquake ground motions, El Centro, Kobe, and Northridge earthquakes, were reduced to the same scale, and the frame system was affected by a uniaxial shaking table. As practiced in this study, PTMDs are usually placed on the top floor of the building. By changing the pendulum length and weights, which are the design parameters of PTMD, its behavior under both harmonic and different real earthquake ground motions is investigated. The tests of the pendulum and pendulum-free system were repeated, with pendulum lengths in the range of 40 mm-200 mm, and the mass of the pendulum being 1%, 3%, and 5% of the total mass of the structure, respectively. The acceleration and displacement values at the reference floors of the model are measured under these four ground motion conditions. Considering the measurement results, pendulum and pendulumless systems with different parameters were compared. It has been observed that PTMDs under harmonic load significantly decrease the top floor acceleration and each floor displacement values compared to the pendulumless system. Although PTMDs under the effect of earthquake ground motion did not give as good results as harmonic loading compared to the pendulumless system, they decreased the acceleration and displacement values. The characteristics of the earthquake also affect the behavior of the pendulum. When the acceleration and displacement values of the structure under the effect of harmonic loads are examined, it is revealed that it performs better than the real earthquake loads.