岩盤の破壊基準と長期強度に関する一考察 Failure Criterion and Long-Term Strength of Rock

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著者

    • 新 孝一 SHIN Koichi
    • (財) 電力中央研究所地盤耐震部 Geotechnical and Earthquake Engineering Department, Central Research Institute of Electric Power Industry

抄録

At first, study on loading-rate dependency of strength was briefly summarized. It is well known that uniaxial (unconfined) compression strength increases with loading rate. Though only limited data are available, some authors reported that confined strength increases with loading rate. Also, tensile strength obtained by uniaxial tension, indirect tension and bending tests increases with loading rate. Based on the summarized experimental results, a failure criterion in which loading-rate dependency of strength is considered was proposed;high criterion for high loading rate and low criterion for low loading rate. As an extreme case, long-term strength or failure criterion at extremely low loading rate can be obtained. The simplest form of the long-term strength is σ1 = a·σ3 where σ1, σ3 are major and minor principal stresses, and constant `a' varies from 2 to 6 depending on rock. For validation of the proposed failure criterion, rock stresses were plotted on σ1 vs. σ3 diagram. It was found that all data except one were plotted under the line σ1 = 4σ3. It is reasonable to consider that, in relatively stable rock mass, rock stress is maintained at a certain value or condition lower than a long-term strength. If so, this result supports the validity of the proposed failure criterion.

収録刊行物

  • 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan  

    資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan 115(4), 213-218, 1999-04-25 

    The Mining and Materials Processing Institute of Japan

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各種コード

  • NII論文ID(NAID)
    10002469383
  • NII書誌ID(NCID)
    AN10062646
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09161740
  • NDL 記事登録ID
    4728021
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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