Repair and Strengthening of Reinforced Concrete Beam-Column Joints: State of the Art

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Title: Repair and Strengthening of Reinforced Concrete Beam-Column Joints: State of the Art

Author(s): Murat Engindeniz, Lawrence F. Kahn, and Abdul-Hamid Zureick

Publication: Structural Journal

Volume: 102

Issue: 2

Appears on pages(s): 187-197

Keywords: beam-column joints; fiber-reinforced polymer; reinforced concrete; repair

Date: 3/1/2005

Abstract:
The latest report by Joint ACI-ASCE Committee 352 (ACI 352R-02) states that joints in structures built before the development of current design guidelines need to be studied in detail to establish their adequacy and that methods of connection repair and strengthening need to be developed. Prior to developing new strengthening schemes, it is important that the findings from research previously conducted on other strengthening techniques be known. This paper presents a comprehensive up-to-date literature search pertaining to the performance of, as well as to the repair and strengthening techniques for, nonseismically designed reinforced concrete beam-column joints, reported between 1975 and 2003. These techniques included: 1) epoxy repair; 2) removal and replacement; 3) concrete jacketing; 4) concrete masonry unit jacketing; 5) steel jacketing and addition of external steel elements; and 6) strengthening with fiber-reinforced polymeric (FRP) composite applications. Each method of repair or strengthening is reviewed with emphasis on its application details, required labor, range of applicability, and performance. Relative advantages and disadvantages of each method are discussed.