Flexural strengthening of impacted PC girder with FRP composites

R. Parretti, A. Nanni, J. Cox, C. Jones, R. Mayo

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

7 Scopus citations


The use of fiber reinforced polymer (FRP) composites to restore the original capacity of impacted prestressed and reinforced concrete (PC and RC) girders is highly effective. In many instances, FRP strengthening represents the only practical and costefficient solution to such problems. The ease and rapid installation of the external FRP reinforcement without traffic interruption is often the key parameter for the use of this technology. In this paper, the flexural strengthening of one accidentally-damaged precast PC girder of a bridge over the Gasconade River, Missouri is presented. The impact resulted in the spalling of concrete and severing of two out of 38 prestressing tendons. The location of the damage was near the mid-span of the girder. The design was based on restoring the ultimate flexural capacity of the member. This was accomplished with the installation of properly anchored carbon FRP laminates (3 plies) using manual lay-up.

Original languageEnglish (US)
Title of host publicationField Applications of FRP Reinforcement
Subtitle of host publicationCase Studies
EditorsSami Rizkalla, Antonio Nanni
PublisherAmerican Concrete Institute
Number of pages14
ISBN (Electronic)9780870311215
StatePublished - Aug 1 2003
Externally publishedYes
EventField Applications of FRP Reinforcement: Case Studies at the ACI Fall 2003 Convention - Boston, United States
Duration: Sep 27 2003Oct 1 2003

Publication series

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


ConferenceField Applications of FRP Reinforcement: Case Studies at the ACI Fall 2003 Convention
Country/TerritoryUnited States


  • Bridges
  • Fiber reinforced polymer (FRP)
  • Flexure
  • Impact damage
  • Prestressed concrete
  • Strengthening

ASJC Scopus subject areas

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


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