Rehabilitation of shear critical concrete columns by use of rectangular steel jackets

Riyad S. Aboutaha, Michael D. Engelhardt, James O. Jirsa, Michael E. Kreger

Research output: Contribution to journalArticle

77 Scopus citations


This paper describes an experimental research program on the use of rectangular steel jackets for seismic retrofit of nonductile reinforced concrete frame columns with inadequate shear strength. Eleven largescale columns were tested to examine the effectiveness of various types of steel jackets for improving the ductility and strength of columns with inadequate shear resistance. Response of the columns before and after being strengthened with steel jackets was examined. Several types of steel jackets were investigated, including rectangular solid steel jackets and partial steel jackets. The test results indicate that a thin rectangular steel jacket can be a highly effective retrofit measure for reinforced concrete columns with inadequate shear resistance.

Original languageEnglish (US)
Pages (from-to)68-78
Number of pages11
JournalACI Structural Journal
Issue number1
StatePublished - Jan 1999



  • Concrete columns
  • Cross ties
  • Ductility
  • Energy dissipation
  • Seismic retrofit
  • Shear reinforcement
  • Shear strength
  • Steel jacket

ASJC Scopus subject areas

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

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