Bond behaviour of a stick shape CFRP reinforcement applied according to the NSM-ETS strengthening techniques

• Author(s): Correia, Luís ; Barros, Joaquim A. O. ; Ayyobi, Pedram ; Malekinejadbahabadi, Hossein
• Date: 2023
• Persistent ID: https://hdl.handle.net/1822/88700
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Bond behavior; Hybrid NSM-ETS; Mechanical properties; Pull-out tests
• Document Type: Conference paper
• Language: English
• Contributor(s): Universidade do Minho

Description

This paper investigates a hybrid strengthening technique that combines the near-surface-mounted (NSM) technique for flexural strengthening with the embedded through section (ETS) technique for shear strengthening using innovative stick-shaped CFRP rebars. The study focuses on the mechanical properties and bond behavior of 7 mm square-sectioned, 30°-bent CFRP rebars. The mechanical characteristics and bond behavior were evaluated by tensile testing, interlaminar shear tests, and direct pull-out tests. The results of the pull-out tests revealed FRP failure, showing a strong link between concrete and CFRP. The findings illustrate the efficiency of the hybrid NSM-ETS technique for reinforcing structures using stick-shaped CFRP laminates.