Experimental investigation on static flexural behavior of fatigue damaged SRC beams strengthened with CFRP sheets

Hailong Gong, Lewei Tong, Xiao Ling Zhao, Yuguang Fu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This paper presents an experimental investigation on CFRP strengthening of severely fatigue damaged SRC (steel-reinforced concrete) beams. Bending tests were carried out on three types of SRC beams: (1) SRC beams without any damage, (2) damaged SRC beams repaired by welding and (3) damaged SRC beams repaired by welding and CFRP. Failure modes of different types of SRC beams were compared. The effects of fatigue loading history and CFRP on static performance of SRC beams were studied. The experimental results showed that, for the fatigue damaged SRC beams, flexural bearing capacity can be restored if they were repaired by welding fractured beams and re-bars even without CFRP sheets, but the plastic strengthening of encased steel is weakened. CFRP sheets can effectively increase the ultimate flexural bearing capacity and overall stiffness of SRC beams. Meanwhile, it can delay crack propagation, reduce the width of surface cracks, and decrease the deflection under yield load and ultimate load. Finally, the strength of CFRP sheets will be fully utilized by using end anchorages.

Original languageEnglish
Title of host publicationProceedings of the 4th Asia-Pacific Conference on FRP in Structures, APFIS 2013
EditorsScott T. Smith, Xiao-Ling Zhao, Yu Bai, Riadh Almahaidi
PublisherInternational Institute for FRP in Construction (IIFC)
ISBN (Electronic)9780987593016
Publication statusPublished - 2013
Externally publishedYes
Event4th Asia-Pacific Conference on FRP in Structures, APFIS 2013 - Melbourne, Australia
Duration: 11 Dec 201313 Dec 2013

Publication series

NameProceedings of the 4th Asia-Pacific Conference on FRP in Structures, APFIS 2013

Conference

Conference4th Asia-Pacific Conference on FRP in Structures, APFIS 2013
Country/TerritoryAustralia
CityMelbourne
Period11/12/1313/12/13

Keywords

  • CFRP sheets
  • Fatigue fracture
  • Flexural behaviour
  • SRC composite beams
  • Strengthening

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)

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