Computers and Concrete

  • 제19권4호
  • /
  • Pages.339-346
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  • 2017
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Experimental study on durability of strengthened corroded RC columns with FRP sheets in tidal zone of marine environment

  • Kashi, Amin (Department of Civil and Environmental Engineering, Amirkabir University of Technology) ;
  • Ramezanianpour, Ali Akbar (Department of Civil and Environmental Engineering, Amirkabir University of Technology) ;
  • Moodi, Faramarz (Department of Civil and Environmental Engineering, Concrete Technology and Durability Research Center (CTDRc), Amirkabir University of Technology)
  • 투고 : 2016.09.23
  • 심사 : 2017.01.03
  • 발행 : 2017.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

The main objective of this paper was to illuminate the effect of marine environmental condition on durability of reinforced concrete (RC)-corroded columns strengthened with carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP) layers. Small-scale columns were prepared and corroded by an accelerated corrosion process. After strengthening, compressive strength tests were carried out on control and weathered specimens. In this research, a marine simulator was designed and constructed similar to the tidal zone of marine environment in south of Iran which was selected as a case study in this research. Mechanical properties of wrapped specimens were studied after placing them inside the simulator for 3000 hours. Marine environment decreased ultimate strength by 4.5% and 26.3% in CFRP and GFRP-wrapped columns, respectively. In some corroded-columns, strengthening was carried out after replacing damaged cover by self-compacted mortar. In this method, by confining with one layer of CFRP and GFRP, 4.2% and 22.4% reduction in ultimate strength was observed, respectively, after exposure. Furthermore, the elastic-brittle behavior has been verified in this retrofit method. Also results of tension tests revealed, the ultimate tensile strength was degraded by 2% and 28.8% in CFRP and GFRP sheets, respectively, after applying marine exposure.

키워드

과제정보

연구 과제 주관 기관 : Amirkabir University of Technology

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