Title: Interface Shear Transfer Mechanism with GFRP Bars Reinforcement

Author(s): Camilo Vega, Abdeldjelil Belarbi, and Antonio Nanni

Publication: Symposium Paper

Volume: 360

Issue:

Appears on pages(s): 212-224

Keywords: Concrete interface, dowel action, GFRP reinforcement, push-off test, shear capacity, shear-friction.

DOI: 10.14359/51740626

Date: 3/1/2024

Abstract:
Most of the research related to interface shear transfer in concrete elements has utilized steel bars as reinforcement, while GFRP reinforcement has received little attention experimentally and analytically. For this reason, only a few design specifications include provisions for the calculation of the interface shear transfer when using GFRP. In this project, an experimental campaign is being conducted to determine the contribution of GFRP bars to the mechanism of shear transfer by using push-off specimens. The literature review and the test methodology are reported in this paper. The obtained results indicate that the use of GFRP reinforcement significantly enhances the interface shear strength, resulting in a capacity that exceeds those of the specimens without reinforcement. When the GFRP-reinforced specimen reaches the first crack at a load similar to that of the unreinforced specimens, it continues carrying load until it reaches a peak, thus indicating that the reinforcement is providing both dowel action and clamping force prior the shear failure. Additionally, once the peak strength is reached, the use of GFRP reinforcement allows the specimen to deform in a pseudo-ductile fashion thus preventing sudden failure.