BASE-ISOLATED HOUSES WITH RESTRICTED DISPLACEMENT ACCORDING TO SEISMIC GRADE AND ITS LIFE-CYCLE-COST

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  • HANAI Tsutomu
    Dept. of Environmental Engineering and Architecture, Graduate School of Environmental Studies, Nagoya Univ.
  • FUKUWA Nobuo
    Dept. of Environmental Engineering and Architecture, Graduate School of Environmental Studies, Nagoya Univ.
  • MORI Yasuhiro
    Dept. of Environmental Engineering and Architecture, Graduate School of Environmental Studies, Nagoya Univ.
  • MINAGAWA Takayuki
    Nihon System Sekkei

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  • 免震層変位を制限した戸建て免震住宅の耐震等級対応法とライフサイクルコスト評価
  • メンシンソウ ヘンイ オ セイゲン シタ コダテメンシンジュウタク ノ タイシン トウキュウ タイオウホウ ト ライフサイクルコスト ヒョウカ

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Abstract

The displacement of the isolated story of a base-isolated house built at a narrow land needs to be restricted using dampers or stoppers to meet the regulation of seismic grade for ordinary houses. This paper investigates the responses of a standard 2-story base-isolated steel frame house with restricted displacement considering various types of soil conditions. It is shown that the higher seismic grade can be achieved with some added dampers or large margin of displacement or by upgrading of the frame. Although the response could be larger than that of the ordinary houses, base-isolated houses have an advantage in terms of Life-cycle cost except for soft soil condition.

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