Selective upgrade of underdesigned reinforced beam-column joints using carbon fiber-reinforced concrete

Andrea Prota, Antonio Nanni, Gaetano Manfredi, Edoardo Cosenza

Research output: Contribution to journalArticlepeer-review

88 Scopus citations


Seismic regions are characterized by reinforced concrete (RC) structures that have been designed without seismic provisions. As the structural upgrade of such structures becomes necessary, one of the approaches that recent design guidelines suggest is that of the hierarchy of strength. By increasing the strength and ductility of critical components, their brittle and catastrophic failure is prevented and the occurrence of more desirable mechanisms is promoted. This approach allows improving the global behavior of the structure. The key issue of strengthening design of RC frames is represented by the beam-column connection. This paper presents a technique based on fiber-reinforced polymer (FRP) composites for the seismic upgrade of RC beam-column connections that was validated with tests on 11 initially underdesigned specimens. The results of the experimental investigation are presented, and a discussion on how different parameters influenced the behavior of the samples in terms of strength or ductility, or both, is offered.

Original languageEnglish (US)
Pages (from-to)699-707
Number of pages9
JournalACI Structural Journal
Issue number5
StatePublished - Sep 2004
Externally publishedYes


  • Beams
  • Columns
  • Ductility
  • Fibers
  • Polymers
  • Reinforcement

ASJC Scopus subject areas

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


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