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
Chat with Us Online Now
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: Effect of the Fracture Energy of the FRP/Concrete Interfacial Behavior On Beams Strengthened in Shear With EB-FRP
Author(s): Ahmed Godat and Omar Chaallal
Publication: Special Publication
Appears on pages(s): 1-10
Keywords: Finite element model, shear strengthening, reinforced concrete beams, FRP/concrete interface, interfacial fracture energy
Abstract:The strengthening of concrete structures by means of externally bonded (EB) fiber-reinforced polymers (FRP) is now routinely considered to be an effective method for enhancing the loading capacity of existing structures. However, the debonding failure often governs the behavior of FRP shear-strengthened beams and prevents them from attaining their full load capacity. This paper presents a finite element model that was developed to investigate the FRP/concrete interfacial properties on the performance of FRP shear-strengthened beams. Nonlinear behavior of the plain concrete, steel reinforcing bars, FRP composites and FRP/concrete interface are simulated with appropriate models. Once the accuracy of the numerical model is established, the numerical analysis is carried out to investigate the parameters responsible for characterizing the initiation and propagation of debonding. These are the interfacial stiffness, the interfacial bond strength and the interfacial fracture energy. In this study, the variation of load–deflection relations is considered as a basis for the comparison. Results show that the interfacial stiffness and the bond strength have neglected influence on the behavior of FRP shear-strengthened beams. Furthermore, the interfacial fracture energy is the main parameter among the bond stress–slip model parameters influencing the strengthening performance of FRP shear-strengthened beams in terms of load–deflection relations and ductility.
Click here to become an online Journal subscriber