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Studies on Method of Limit States Design for Underground RC Frame Structures

Research Project

Project/Area Number 02452193
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field コンクリート工学・土木材料・施工
Research InstitutionSaitama University

Principal Investigator

WATANABE Hiroyuki  Saitama University, Fac. Engr., Professor, 工学部, 教授 (90159244)

Co-Investigator(Kenkyū-buntansha) MUTSUYOSHI Hiroshi  Saitama University, Fac. Engr., Associate Prof., 工学部, 助教授 (60134334)
MACHIDA Atsuhiko  Saitama University, Fac. Engr., Professor, 工学部, 教授 (50008869)
KAWAKAMI Hideji  Saitama University, Fac. Engr., Associate Prof., 工学部, 助教授 (50125887)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥5,800,000 (Direct Cost: ¥5,800,000)
Fiscal Year 1991: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1990: ¥3,100,000 (Direct Cost: ¥3,100,000)
KeywordsUnderground conduit / Dynamic earth pressure / Model exciting test / Numerical analysis / Ratio of shear rigidity / Rate of bearing share in load / Ductility / Limit states bearing capacity / Underground Conduit / Dynamic Earth Pressure / Model Vibration Test / 2DーFEM Numerical Simulation / Ground Reaction Factor / Size Effect / Energy Method / NonーDimesional Shearing Rigidity
Research Abstract

In order to establish the method of "Limit States Design for Underground RC Frame Structures" it is most important for us to estimate the seismic forces acting on the structures. Main part of the seismic forces are horizontal earth pressures. In Japanese current aseismatic design standard it is specified to determine above dynamic earth pressures by Mononobe and Okabe's formulae which were, however, originally proposed for the purpose of the earthquake resistant design of retaning wall, so that they are not necessarily fit to such underground structure of flexible walls as underground conduit. Thus, we must establish an idea of mechanism of generating dynamic earth pressures for the first as well as the formula to be able to predict them reasonably.
A model ground of air dried Gifu sand compacted in a shear testing apparatus and three composite models at each of which the model conduit of different rigidity was buried in the above same model ground were excited horizontally with sinusoi … More dal motions of resonant frequencies on a shaking table.
The observed response dynamic earth pressures along a side wall of conduit show that the distribution of them at the same phase of base motion reverses in its direction as the shearing rigidity of conduit changes from lower to higher than the oneof surrounding soil layer. In the case of lower rigidity of conduit the response acceleration at its bottom is much lower than the one in free ground case. The simulations of above tests with FEM numerical models show the same behavior as mentioned above. Synthesizing both experimental and numerical results the mechanism of development of dynamic earth pressures acting on side walls of underground conduit has been clarified and a formula predicting them has been derived.
Besides, the characteristics of the ductility of reinforced concrete frames have been clarified and a method of estimation of it has been established too. With all the results obtained above it may be said that a method to estimate the limit states bearing capacity of underground RC conduit has been established. Less

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] 渡辺 啓行: "地中ダクト側壁動土圧に関する実験的検討" 土木学会論文集. No.432/Iー16. 155-163 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 渡辺 啓行: "数値実験による地中ダクト動的水平直土圧の評価" 土木学会論文集. No.432/Iー16. 165-173 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 渡辺 啓行: "地中ダクトの地震時動土圧の理論" 土木学会論文集. No.432/Iー16. 185-194 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 渡辺 啓行: "地中ダクトの地震時動土圧理論のダクト剛性全領域への拡張" 第21回地震工学研究発表会講演概要. 429-432 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Atsuhiko Machida: "Evaluation of Ductility of R/C Members and Influence of Ductility on Inelastic Response Behavior of R/C Frame Structures." International Workshop on Concrete Shear in Earthquake,January 1991.(1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hiroyuki Watanabe: "An experimental study on dynamic earth pressure acting on side walls of underground conduit" Proc. of JSCE. No. 432/I-16. 155-163 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hiroyuki Watanabe: "A method to estimate the normal dynamic earth pressure acting horizontally on side walls of underground conduit" Proc. of JSCE. No. 432/I-16. 165-175 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hiroyuki Watanabe: "A theory on dynamic earth pressures acting on underground conduit during earthquakes" Proc. of JSCE. No. 432/I-16. 185-194 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hiroyuki Watanabe: "Extension of the theory on dynamic earth pressures acting on underground conduit to all range of the rigidity of conduit" Proc. of the 21th JSCE Earthquake Engineering Symposium. 429-432 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Atsuhiko Machida: "Evaluation of ductility of R/C members and influence of ductility on inelastic response behavior of R/C frame structures" International Workshop on Concrete Shear in Earthquake. January. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 渡辺 啓行: "地中ダクト側壁動土圧に関する実験的検討" 土木学会論文集. No.432/Iー16. 155-163 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 渡辺 啓行: "数値実験による地中ダクト動的水平直土圧の評価" 土木学会論文集. No.432/Iー16. 165-173 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 渡辺 啓行: "地中ダクトの地域時動土圧の理論" 土木学会論文集. No.432/Iー16. 185-194 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 渡辺 啓行: "地中ダクトの地震時動土圧理論のダクト剛性全領域への拡張" 第21回地震工学研究発表会講演概要. 429-432 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Atsuhiko Machida: "Evaluation of Ductility of R/C Members and Influence of Ductility on Inelastic Response Behavior of R/C Frame Structures." International Workshop on Concrete Shear in Earthquake,January 1991.(1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 渡辺 啓行: "地中ダクト側壁動土圧に関する実験的検討" 土木学会論文集.

    • Related Report
      1990 Annual Research Report
  • [Publications] 渡辺 啓行: "数値実験による地中ダクトの動的水平動土圧の評価" 土木学会論文集.

    • Related Report
      1990 Annual Research Report
  • [Publications] 渡辺 啓行: "地中ダクトの地震時動土圧の理論" 土木学会論文集.

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2018-02-02  

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