OPTIMAL DESIGN OF INERTIAL MASS DAMPER FOR SDOF ELASTIC-PLASTIC BUILDING STRUCTURES SUBJECTED TO LONG-DURATION EARTHQUAKE GROUND MOTIONS

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  • NAKATA Shun
    Dept. of Architecture and Architectural Eng., Kyoto Univ.
  • FUJITA Kohei
    Dept. of Architecture and Architectural Eng., Kyoto Univ.
  • TAKEWAKI Izuru
    Dept. of Architecture and Architectural Eng., Kyoto Univ.

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Other Title
  • 長周期長時間地震動を受ける1 層弾塑性建築構造物に対する慣性質量ダンパーの最適設計

Abstract

<p>Tuned mass dampers exhibit high performance when optimally tuned to a structure. However, their damping performance decreases once the natural period of the structure is elongated due to the elastic-plastic response under strong earthquakes. In this paper, long-duration earthquake ground motions are substituted by the multi impulse and the optimal characteristics of the tuned inertial mass dampers are derived numerically. This substitution allows us to avoid conducting repetitive computation of complicated and time-consuming nonlinear time-history response analysis. An ideal drift response curve is proposed for structures subjected to multilevel seismic ground motion inputs and an optimal design method is presented.</p>

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