AN EXAMINATION OF THE RELATIONSHIP BETWEEN SURFACE GROUND STRAIN AND VELOCITY INDUCED BY EARTHQUAKE

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  • MORICHI Shigeaki
    社団法人 土木学会 東京理科大学 理工学部土木工学科
  • SHIGIHARA Yoshinori
    社団法人 土木学会 東北大学大学院附属災害制御研究センター
  • IMAMURA Yoshinori
    社団法人 土木学会 東京理科大学 理工学部土木工学科
  • UMEDA Yusuke
    社団法人 土木学会 東京理科大学大学院理工学研究科土木工学専攻

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  • 地盤ひずみと地盤粒子速度との関連についての地震記録に基づく一考察
  • ジバンヒズミ ト ジバン リュウシ ソクド ト ノ カンレン ニ ツイテ ノ ジシン キロク ニ モトヅク イチ コウサツ

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The relationship between surface ground strain records and ground motion velocity records is examined. More records than observed in this study are needed to obtain a credible relationship between strain amplitude and velocity. As for the relationship between time history of strain and that of velocity, the time variation of two strain invariants and that of resultant velocity are compared at interval of 1/100 second. When the absolute value of strain invariant showed a peak value in time history, the resultant velocity showed a minimum during sinusoidal vibration and showed a peak value during wave propagation. According to the analysis, the state of sinusoidal vibration and wave propagation appeared respectively in about half of the measurement. Therefore, the relationship between time history of strain and that of velocity was not clalified.

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