Abstract:To develop dampers with good damping performance, a new type of multiple tuned impact dampers (MTID) was proposed by combining particle damper with multiple tuned mass dampers (MTMD), and its damping performance was optimized and analyzed. Firstly, the performance-based multi-objective optimization design method and process were proposed when MTID is applied to practical engineering structures. Then, based on a 20-story benchmark structure, the vibration control performance of the traditional design and optimized design MTID was analyzed. The optimal damping performance and working stroke of MTID and MTMD are also compared. The results show that it takes a certain start-up time for MTID to play its damping performance effectively, and the dynamic response of the main structure can be significantly reduced after MTID is started. The optimized MTID has better damping performance than the traditional design, and then significantly reduce the plastic deformation and nonlinear damage of the main structure under a major earthquake. Furthermore, the optimal damping performance of MTID and MTMD are relatively close, but the working stroke of MTID is smaller.
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