Investigation of prestressed FRP joint via Grooving Method

Shabani, ٍErfan; Saljoughian, Alireza; Mostofinejad, Davood

doi:10.22124/jcr.2024.26203.1636

Investigation of prestressed FRP joint via Grooving Method

Document Type : Research Paper

Authors

¹ Civil Engineering Department,- Isfahan University of technology

² Isfahan university of technology

10.22124/jcr.2024.26203.1636

Abstract

In the strengthening of RC structures with fibre-reinforced polymer (FRP) sheets, it is crucial to prevent the premature deboning of the FRP composites from the concrete surface. One effective method for delaying debonding and enhancing material usage is the use of pre-stressed FRP composites. This technique provides several benefits, such as increasing the overall capacity of the structure, enhancing cracking capacity, reducing strain in the longitudinal rebars, and etc. Recent research has demonstrated that grooving methods can effectively delay the debonding. Consequently, this study investigates the bond behavior between concrete and prestressed FRP sheets strengthened using grooving methods. The results from the lap shear-prestressed test revealed a substantial increase in performance when using the 5@15 groove class with 20% and 30% prestressing. In comparison to the reference specimen, there was an increase of 146% and 195%, respectively. This indicates that the utilization of prestressed FRP with grooving methods can significantly enhance bond capacity.

Keywords

Main Subjects

Concrete structures

References

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