DISCUSSION ON GENERATION OF SEISMIC EARTH PRESSURE OF ABUTMENT

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  • SUZUKI Kenichi
    東日本旅客鉄道株式会社 構造技術センター
  • IKEMOTO Hirofumi
    東日本旅客鉄道株式会社 JR東日本研究開発センター フロンティアサービス研究所
  • SANAGAWA Taisuke
    公益財団法人鉄道総合技術研究所 構造物技術研究部
  • ABE Keita
    東日本旅客鉄道株式会社 JR東日本研究開発センター フロンティアサービス研究所
  • TAKASAKI Hideaki
    東日本旅客鉄道株式会社 JR東日本研究開発センター フロンティアサービス研究所
  • NISHIOKA Hidetoshi
    公益財団法人鉄道総合技術研究所 構造物技術研究部

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Other Title
  • 橋台の地震時土圧発現機構に関する一考察

Description

 In this study, a series of shaking table test of an abutment model with 1.0 m high that was designed as a 1/8 scale model of a gravity abutment with 8.0 m high was performed using L1 and L2 seismic waves and 3.0 Hz sine waves that were incrementally increased step by step in order to investigate mechanism of generation of seismic earth pressure interacting on the abutment. Behavior of the abutment model and a backfill soil during shaking was analyzed by an image analysis tracing displacement of markers installed on the model and soil using a high speed camera. It was confirmed that the generation of seismic earth pressure was influenced by small relative displacement between the abutment model and backfill soil as well as response acceleration of the backfill soil as a result from the shaking table test. Also, it was found out that relationship between the seismic earth pressure, inertial force of the backfill soil, and the relative displacement between the abutment model and backfill soil was different depending on height of the abutment model and influenced by the behavior of the abutment model and backfill soil.

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