• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Investigation on the relationship between visual inspection results and remaining performance of existing civil FRP structures

Research Project

Project/Area Number 21H01419
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 22020:Structure engineering and earthquake engineering-related
Research InstitutionKyoto University

Principal Investigator

Kitane Yasuo  京都大学, 工学研究科, 教授 (10444415)

Co-Investigator(Kenkyū-buntansha) 橋本 国太郎  神戸大学, 工学研究科, 准教授 (40467452)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Fiscal Year 2023: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
KeywordsFRP / 劣化 / 残存性能 / 外観評価 / 非破壊試験 / 補修 / 維持管理
Outline of Research at the Start

現在,既設土木FRP構造物の経年が進んできているが,他の分野の構造物と比較して規模が大きく,また設計耐用年数も長い土木構造物のFRP部材の維持管理方法は未だ確立されておらず,その確立が求められている.本研究は,土木FRP構造物の維持管理において,点検時の外観および非破壊検査結果から構造性能を評価する方法を確立することを目指し,劣化したFRP部材に対して,外観調査,非破壊検査,強度実験を実施することにより,外観変状および非破壊検査結果と残存構造性能の関係を明らかにしようとするものである.

Outline of Final Research Achievements

In this study, in order to collect data that will contribute to the maintenance of civil FRP structures, material tests and component tests were conducted on FRP components exposed for approximately 20 years to understand the remaining performance after exposure and to compare it with the visual evaluation. It was found that in the case of moisture-induced deterioration, it is difficult to determine the remaining mechanical performance by visual evaluation. Surface repairs and strength restoration repairs were also conducted to confirm the effectiveness of the performance restoration. Outdoor exposure tests for 20 years are still ongoing for the surface-repaired specimens. Furthermore, evaluation of the residual performance of FRP by several different nondestructive tests was attempted, and it was found that at present it may be difficult to evaluate the strength degradation due to material deterioration, although the elastic modulus degradation may be evaluated for a certain cases.

Academic Significance and Societal Importance of the Research Achievements

FRPが土木構造物に適用され始めてから数十年が経過しているが,土木FRP構造物の維持管理方法は未だ確立されていない.本研究の成果は,土木FRP構造物の点検における外観評価の判断材料になるとともに,劣化が大きい場合の補修事例も示しており,FRP構造物の維持管理に有用な知見を提示している.また,外観では判別することが難しい水分による劣化が大きいことも実験的に明らかにしており,今後水分による長期的な劣化プロセスおよびその程度を明らかにする必要性が示されたことは学術的にも意義が大きい.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (9 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 1 results) Book (1 results)

  • [Journal Article] EXPERIMENTAL EVALUATION ON RESIDUAL BENDING PERFORMANCE OF GFRP PULTRUDED BOX SECTION MEMBER EXPOSED FOR 20 YEARS2023

    • Author(s)
      辰田翔太,北根安雄,日比英輝,佐藤顕彦,杉浦邦征,西﨑到
    • Journal Title

      Japanese Journal of JSCE

      Volume: 79 Issue: 14 Pages: n/a

    • DOI

      10.2208/jscejj.22-14004

    • ISSN
      2436-6021
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] STUDY ON MECHANICAL PERFORMANCE AND MICROSTRUCTURE OF HYBRID FRP PULTRUDED MATERIAL EXPOSED FOR 21 YEARS2023

    • Author(s)
      佐藤顕彦,西崎 到,冨山禎仁,北根安雄,杉浦邦征
    • Journal Title

      Japanese Journal of JSCE

      Volume: 79 Issue: 4 Pages: n/a

    • DOI

      10.2208/jscejj.22-00138

    • ISSN
      2436-6021
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] FATIGUE STRENGTH AND STIFFNESS DEGRADATION OF HAND LAY-UP GFRP2022

    • Author(s)
      佐藤 顕彦,北根 安雄,日比 英輝,五井 良直,杉浦 邦征
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE))

      Volume: 78 Issue: 5 Pages: II_54-II_65

    • DOI

      10.2208/jscejseee.78.5_II_54

    • ISSN
      2185-4653
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] 局部的に高熱損傷を受けたGFRP材料の引張挙動の変化特性に関する一検討2023

    • Author(s)
      橋本国太郎,日比英輝,北根安雄,西﨑到
    • Organizer
      第15回複合・合成構造の活用関するシンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] 約20年間暴露されたGFRP引抜成形角パイプの 曲げ耐荷力実験2022

    • Author(s)
      辰田 翔太,北根 安雄,日比 英輝,佐藤 顕彦,杉浦 邦征,西﨑 到
    • Organizer
      第9回FRP複合構造・橋梁に関するシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] ハンドレイアップ成形GFRPの疲労損傷が 構造部材の残存剛性に与える影響2022

    • Author(s)
      佐藤 顕彦,北根 安雄,杉浦 邦征,日比 英輝,五井 良直
    • Organizer
      第9回FRP複合構造・橋梁に関するシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Study on Evaluation of Residual Performance of GFRP Pultrusion Molded Materials with Long-term Exposure by Ultrasonic Testing2022

    • Author(s)
      Shota Tatsuta, Yasuo Kitane, Hideki Hibi, Kunitomo Sugiura
    • Organizer
      The 8th Asia-Pacific Conference on FRP in Structures
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 材料試験及び非破壊検査による約20年間暴露されたGFRP引抜成形材の残存性能評価2021

    • Author(s)
      辰田翔太,北根安雄,日比英輝,佐藤顕彦,五井良直,杉浦邦征,西崎到
    • Organizer
      第14回複合・合成構造の活用に関するシンポジウム
    • Related Report
      2021 Annual Research Report
  • [Book] FRP複合構造の設計・維持管理に関する最新の調査報告 第3部2023

    • Author(s)
      土木学会複合構造委員会FRP複合構造の設計・維持管理に関する調査研究小委員会(編) 西﨑到,橋本国太郎,北根安雄,竿代矢須子,日比英輝,三ツ木幸子,西墻弘美,細沼宏之,川島陽子,藤田直博,秀熊拓也
    • Total Pages
      149
    • Publisher
      土木学会
    • ISBN
      9784810611007
    • Related Report
      2023 Annual Research Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi