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Earthquakes and Structures
  Volume 1, Number 3, September 2010, pages 289-306

An evolutionary algorithm for optimal damper placement to minimize interstorey-drift transfer function in shear building
Kohei Fujita, Kaoru Yamamoto and Izuru Takewaki

    A gradient-based evolutionary optimization methodology is presented for finding the optimal design of viscous dampers to minimize an objective function defined for a linear multi-storey structure. The maximum value along height of the transfer function amplitudes for the interstorey drifts is taken as the objective function. Since the ground motion includes various uncertainties, the optimal damper placement may be different depending on the ground motion used for design. Furthermore, the transfer function treated as the objective function depends on the properties of structural parameters and added dampers. This implies that a more robust damper design is desired. A reliable and robust damping design system against any unpredictable ground motions can be provided by minimizing the maximum transfer function. Such design system is proposed in this paper.
Key Words
    optimal damper placement; transfer function; evolutionary optimization; gradient-based method; earthquake response.
Kohei Fujita, Kaoru Yamamoto and Izuru Takewaki: Department of Urban and Environmental Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo-ku, Kyoto 615-8540, Japan

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