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Structural Engineering and Mechanics
  Volume 29, Number 6, August20 2008, pages 603-622
DOI: http://dx.doi.org/10.12989/sem.2008.29.6.603
 


Stochastic optimum design of linear tuned mass dampers for seismic protection of high towers
Giuseppe Carlo Marano, Rita Greco and Giuseppe Palombella

 
Abstract
    This work deals with the design optimization of tuned mass damper (TMD) devices used for mitigating vibrations in high-rise towers subjected to seismic accelerations. A stochastic approach is developed and the excitation is represented by a stationary filtered stochastic process. The effectiveness of the vibration control strategy is evaluated by expressing the objective function as the reduction factor of
the structural response in terms of displacement and absolute acceleration. The mechanical characteristics of the tuned mass damper represent the design variables. Analyses of sensitivities are carried out by varying the input and structural parameters in order to assess the efficiency of the TMD strategy. Variations between two different criteria are also evaluated.
 
Key Words
    TMD; structural optimization; random vibrations.
 
Address
Giuseppe Carlo Marano: Dept. of Environmental Engineering and Sustainable Development, Technical University of Bari, Viale del Turismo 10-Taranto, Italy
Rita Greco: Dept. of Civil Engineering and Architecture, Technical University of Bari, Via Oraboma, 4, Bari, Italy
Giuseppe Palombella: Dept. of Structural Engineering, Geotechnical Engineering, Engineering Geology (DiSGG), University of Basilicata, C.da Macchia Romana, 85100-Potenza, Italy
 

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