In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Retrofitting of Reinforced Concrete Beam-Column Joints by Composites—Part II: Analytical Study
Author(s): Cem Yalçın, Osman Kaya, Emre Biçer, and Azadeh Parvin
Publication: Structural Journal
Appears on pages(s): 31-39
Keywords: analytical model; beam-column joints; carbon fiber-reinforced polymers (CFRPs); joint capacity; joint failure mechanisms; reinforced concrete; shear strengthening
Abstract:Beam-column joints (BCJs) in reinforced concrete (RC) structural systems are the critical regions, especially when they are subjected to high shear demands. According to earthquake reports and joint subassembly tests in the literature, mostly brittle failures were experienced due to inadequate design detailing. To avoid such failures, several strengthening techniques were developed for weak BCJ regions such as externally applied steel and RC jackets, and fiber-reinforced polymer (FRP) materials. Experimental results revealed alleviation of these deficiencies and improved shear capacities of the strengthened joints. Shear capacity predictions of these retrofitted joint subassemblies for design purposes require analytical models. In this study, an analytical model and computation procedure was proposed to predict the lateral load capacities of the shear-critical joint subassemblies with or without carbon fiber-reinforced polymer (CFRP) wrapping technique. Several failure mechanisms such as shear failure in joint panel, crushing of concrete in the beam, yielding of the beam reinforcement, or rupture of CFRP wrapping were determined for each incremental lateral load level and most critical ultimate lateral load capacity was found. The predicted results were compared with the experimental results in Part I of this paper as well as other research in the literature, and they were in good agreement.
Click here to become an online Journal subscriber