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EVALUATION OF SHEAR CAPACITY OF REINFORCED CONCRETE MEMBERS WITH RUPTURED SHEAR REINFORCEMENT DUE TO ASR DAMAGE

Research Project

Project/Area Number 17560436
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural engineering/Earthquake engineering/Maintenance management engineering
Research InstitutionOsaka Institute of Technology

Principal Investigator

INOUE Susumu  Osaka Institute of Technology, FACULTY OF ENGINEERING, PROFESSOR (30168447)

Project Period (FY) 2005 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2006: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2005: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywordsalkali-silica reaction / shear capacity / rupture of shear reinforcement / bond and anchorage / expansion of concrete / deterioration of material / outdoor exposure / bond strength / 屋外暴露
Research Abstract

In recent years, it is reported in Japan that stirrups, as well as longitudinal steels, in T-shaped beams of bridge piers were ruptured at their bent corners mainly due to large ASR expansion. Therefore, it is essential to make clear the shear resistant mechanism of the beams, in which the stirrups are ruptured at the bent corner, in order to evaluate their residual shear capacity.
In this study, the effects of expansion of concrete as well as bond and anchorage characteristics of stirrups on shear behaviour are investigated. Bond strength of ASR damaged concrete is also examined in order to evaluate the bond and anchorage characteristics of ruptured steels.
From the test results, it is found that rupture of stirrups has relatively large influence on shear capacity of reinforced concrete beams. However, the degree of the influence depends largely on the anchorage characteristics of ruptured stirrups in ASR damaged concrete.

Report

(4 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (9 results)

All 2008 2007 2006

All Journal Article (7 results) (of which Peer Reviewed: 3 results) Presentation (2 results)

  • [Journal Article] ASR損傷によるせん断補強筋の破断がRCはり部材のせん断耐荷特性に及ぼす影響2008

    • Author(s)
      高橋 勇希, 澤井 健二, 三方 康弘, 井上 晋
    • Journal Title

      コンクリート工学年次論文集 30(印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Effects of Rupture of Stirrups Due to ASR on Shear Behavior of Reinforced Concrete Beams2008

    • Author(s)
      Yuki Takahashi, Kenji Sawai, Yasuhiro Mikata, Susumu Inoue
    • Journal Title

      Proc. of the JCI Vol.30(in printing)

    • NAID

      110009697559

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] ASR損傷によりせん断補強筋の破断が生じたRCはり部材のせん断耐荷性状に関する基礎的研究2007

    • Author(s)
      澤井 健二, 高橋 勇希, 大下 寛司, 三方 康弘, 井上 晋
    • Journal Title

      コンクリート構造物の補修, 補強, アップグレード論文報告集 7

      Pages: 85-90

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Experimental Study on Shear Resistant Mechanism of Reinforced Concrete Beams with Ruptured Stirrups Due to ASR2007

    • Author(s)
      Kenji Sawai, Yuki Takahashi, Hiroshi Oshita, Yasuhiro Mikata, Susumu Inoue
    • Journal Title

      Proc. of the Concrete Structure Scenarios, JSMS Vol.7

      Pages: 85-90

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] コンクリートの膨張およびせん断補強筋の付着・定着がRCはり部材のせん断耐荷性状に及ぼす影響2006

    • Author(s)
      大下 寛司, 澤井 健二, 波多野 雄士, 井上 晋
    • Journal Title

      コンクリート構造物の補修, 補強, アップグレード論文報告集 6

      Pages: 83-88

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Effects of Expansion of Concrete, Bond and Anchorage Characteristics of Shear Reinforcement on Load Carrying Behavior of RC Beam Members2006

    • Author(s)
      Hiroshi Oshita, Kenji Sawai, Yuji Hatano, Susumu Inoue
    • Journal Title

      Proc. of the Concrete Structure Scenarios, JSMS Vol.6

      Pages: 83-88

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] コンクリートの膨張およびせん断補強筋の付着・定着がRCはり部材のせん断耐荷性状に及ぼす影響2006

    • Author(s)
      大下寛司, 澤井健二, 波多野雄士, 井上晋
    • Journal Title

      コンクリート構造物の補修,補強,アップグレード論文報告集 第6巻

      Pages: 83-88

    • Related Report
      2006 Annual Research Report
  • [Presentation] Bond Characteristics of Reinforcing Bars in Damaged ASR Concrete2008

    • Author(s)
      Kenji Sawai
    • Organizer
      62nd Annual Conference of JSCE
    • Place of Presentation
      Hiroshima University
    • Year and Date
      2008-09-14
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] ASR損傷コンクリート中の鉄筋の付着特性に関する基礎的研究2007

    • Author(s)
      澤井 健二
    • Organizer
      土木学会第62回年次学術講演会
    • Place of Presentation
      広島大学
    • Year and Date
      2007-09-14
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2005-04-01   Modified: 2016-04-21  

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