EARTHQUAKE ENERGY INPUT TO STRUCTURE-PILE-S01L SYSTEMS

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  • TAKEWAKI Izuru
    Dept. of Urban and Environmental Engineering, Graduate School of Eng., Kyoto University
  • OHFUCHI Kuniyuki
    Dept. of Architecture and Architectural Engineering. Graduate School of Eng., Kyoto University
  • YAMAZAKI Masahiro
    Dept. of Architecture and Architectural Engineering, Graduate School of Eng., Kyoto University

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Other Title
  • 構造物-杭-地盤連成系への地震エネルギー入力
  • コウゾウブツ クイ ジバンレンセイケイ エ ノ ジシン エネルギー ニュウリョク

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Description

A new frequency-domain method is developed for evaluating the earthquake input energy to a structure-pile-soil system or a super-structure alone subjected to a horizontal ground motion at an outcropping engineering bedrock surface. It is shown that the formulation of the earthquake input energy in the frequency domain is essential for including the frequency-dependent vibration property of the surface ground in terms of the wave propagation theory and the frequency-dependent property of the dynamic Winkler-type spring of the soi l around piles. It is also demonstrated that (l)the present formulation is effective for various input levels and various ground nronerties and (2)the energy input mechanism in the building structure-pile-soil system can be well described by the newly introduced energy transfer function (F-function).

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