Concrete cover delamination in reinforced concrete beams strengthened with carbon fiber reinforced polymer sheets

Gustavo Tumialan, Paolo Serra, Antonio Nanni, Abdeldjelil Belarbi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

48 Scopus citations

Abstract

In addition to the conventional modes of failure observed in RC beams, new ones can be detected in RC members strengthened by means of externally bonded FRP reinforcement. Concrete cover delamination is a mode of failure caused by shear transfer and local regions of tension stress fields. A series of tests were carried out in order to study the concrete cover delamination failure, wherein the variables were length of beam span, bonded area, number of plies, and U-jacketing schemes. Two mechanisms within the concrete cover delamination failure were observed: one starting at the cutoff point of the FRP, which is originated by a high concentration of normal (out-of-plane) and shear stresses, and second one starting at an intermediate crack. The latter mode of failure is caused by normal and shear stresses at the level of the steel reinforcement. From the point of view of design, it is important to recognize this premature type of failure, and determine algorithms for its prediction.

Original languageEnglish (US)
Title of host publication4th International Symposium - Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures
EditorsCharles W. Dolan, Sami H. Rizkalla, Antonio Nanni
PublisherAmerican Concrete Institute
Pages725-735
Number of pages11
ISBN (Electronic)9780870316876
StatePublished - Aug 1 1999
Externally publishedYes
Event4th International Symposium on Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures - Baltimore, United States
Duration: Oct 31 1999Nov 5 1999

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-188
ISSN (Print)0193-2527

Conference

Conference4th International Symposium on Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures
Country/TerritoryUnited States
CityBaltimore
Period10/31/9911/5/99

Keywords

  • Carbon fiber reinforced polymer sheets
  • Ductility
  • Flexural strength
  • Reinforced concrete
  • Strengthening
  • U-jacketing

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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