Flexible-Jointed-Damping-Based MTMD for Structures under Earthquake
Li Chunxiang(1), Liu Yanxia(2), Wang Zhaomin(2)
(1, School of Civil Engineering and Mechanics, Shanghai Jiaotong University, Shanghai 200030)
(2, School of Civil Engineering, Tongji University, Shanghai 200092)

Abstract: The dynamic characteristics of flexible-jointed-damping-based multple tuned mass dampers (MTMD) are studied in reducing the seismic response of structures. Employing the derived transfer function of the MTMD structure system, the design formula for the dynamic magnification factor (DMF) of the MTMD structure system is then derived. The minimization of the minimum values of the maximum DMF (Min. Min. Max. DMF) is chosen as the optimum criterion. Subsequently, the optimum parameters of the MTMD and the corresponding Min. Min. Max. DMF are obtained for different stiffness ratio. For the purpose of comparison, the results for rigid-jointed-damping-based MTMD (R=0) are also taken into account. Extensive numerical analyses indicate that the performance of the conventional rigid-jointed-damping-based MTMD may be extended to flexible-jointed-damping-based MTMD within a certain range of stiffness ratio.
Keywords: vibration control, flexible-jointed-damping-based MTMD, Min.Min.Max. DMF, optimization.