RELATIONSHIP BETWEEN DEFORMATIONS OF THE SEISMIC-ISOLATION LAYER OF HOUSES AND GROUND VIBRATION PROPERTIES IN MIYAGI PREFECTURE DURING THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE

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  • TAKAHASHI Takehiro
    Researcher, Disaster Mitigation Research Center, Nagoya Univ., M. Eng.
  • FUKUWA Nobuo
    Prof., Disaster Mitigation Research Center, Nagoya Univ., Dr. Eng.

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Other Title
  • 2011年東北地方太平洋沖地震における宮城県内に建設された戸建免震住宅の免震層変形と地盤震動特性との関係
  • 2011ネン トウホク チホウ タイヘイヨウオキ ジシン ニ オケル ミヤギ ケンナイ ニ ケンセツ サレタ コダテメンシンジュウタク ノ メンシンソウ ヘンケイ ト ジバン シンドウ トクセイ ト ノ カンケイ

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Abstract

To enhance the safety of seismic-isolated houses, the authors have investigated the cause of large deformations of the seismic-isolation layer of houses during the 2011 Tohoku earthquake. Our findings show that unlike resonant responses in the Ashigara valley, pulse responses were seen in many seismic-isolated houses in Miyagi prefecture. The authors have verified that the maximum deformations of the seismic-isolation layer have a very high co-relational relationship with the peak ground velocity of pulse ground motion and amplification characteristics of the surface ground rather than the deep layers of the ground.

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