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An evolutionary algorithm for optimal damper placement to minimize interstorey-drift transfer function in shear building

  • Fujita, Kohei (Department of Urban and Environmental Engineering, Kyoto University) ;
  • Yamamoto, Kaoru (Department of Urban and Environmental Engineering, Kyoto University) ;
  • Takewaki, Izuru (Department of Urban and Environmental Engineering, Kyoto University)
  • Received : 2010.05.03
  • Accepted : 2010.07.08
  • Published : 2010.09.25

Abstract

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.

Keywords

optimal damper placement;transfer function;evolutionary optimization;gradient-based method;earthquake response

Acknowledgement

Supported by : Japan Society for the Promotion of Science

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