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Evaluation of Residual Capacity of Pre-tensioned Prestressed Concrete Members Damaged by a Fire and Their Strengthening Methods

Research Project

Project/Area Number 26420443
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Civil engineering materials/Construction/Construction management
Research InstitutionOsaka Institute of Technology

Principal Investigator

Inoue Susumu  大阪工業大学, 工学部, 教授 (30168447)

Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywords耐火性 / プレテンションPC部材 / 残存プレストレス / 静的耐力 / 疲労性状 / 鋼板接着 / 炭素繊維プレート接着 / プレテンションPC部材 / 耐火特性 / 高温履歴 / 付着特性 / 疲労破壊 / 残存耐荷力
Outline of Final Research Achievements

In this study, residual road carrying capacity of pre-tensioned prestressed concrete members damaged by a fire is investigated.
In case that the anchorage regions of prestressing steels were directly exposed to flames of a fire, prestress of a prestressed concrete member decreased significantly, and accordingly, the residual static and fatigue capacity of the member decreased. Although the degree of deterioration depends on the test variables such as the maximum suffered temperature, the cover of prestressing steels, and so on, the cover should be more than twice of that determined from the durability requirement for the members in which fire-resistant properties are required. It was confirmed that steel plate bonding and carbon fiber plate bonding are quite effective for restoring the deteriorated load carrying capacity of pretensioned prestressed concrete members damaged by a fire. However, attention should be paid to the treatment of the deteriorated concrete surface.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (3 results)

All 2017 2016 2015

All Presentation (3 results)

  • [Presentation] 火災による損傷を受けたプレテンションPCはり部材の耐荷特性とその補強効果に関する研究2017

    • Author(s)
      田渕陽佑,三方康弘,井上晋
    • Organizer
      平成29年度 土木学会関西支部 年次学術講演会
    • Place of Presentation
      大阪工業大学
    • Related Report
      2016 Annual Research Report
  • [Presentation] 火災による損傷を受けたプレテンションPCはり部材の疲労性状2016

    • Author(s)
      田渕陽佑,井上晋,三方康弘
    • Organizer
      土木学会関西支部
    • Place of Presentation
      立命館大学 びわこ・くさつキャンパス
    • Year and Date
      2016-06-11
    • Related Report
      2015 Research-status Report
  • [Presentation] 火害を受けたプレテンションPCはり部材の残存耐荷特性に及ぼす受熱範囲の影響2015

    • Author(s)
      田渕陽佑,井上晋,三方康弘
    • Organizer
      平成27年度土木学会関西支部年次学術講演会
    • Place of Presentation
      摂南大学
    • Year and Date
      2015-05-30
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2018-03-22  

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