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Abstract

The bonding performance between hybrid bonding FRP (HB-FRP) and concrete is crucial for HB-FRP reinforcement of concrete structures. This paper built a simple shear numerical model for HB-FRP, which considered both the interfacial bond slip between FRP and concrete by adopting bilinear constitutive analysis, and the interfacial bond slip at the steel fastener location by employing trilinear constitutive analysis. Meanwhile, the bond slip properties at the steel fastener location were simulated by double springs. Based on the arc-length method, the entire process of loading and unloading of the HB-FRP simple shear model was carried out to study its stress performance. Additionally, the experimental data was compared and analyzed to verify the effectiveness of the numerical model, reveal the bond slip properties of HB-FRP during unloading, and correct the existing bond slip model. Parameter analysis was conducted on the adhesive length, and based on the analysis results, the effective bonding length of HB-FRP was calculated to be around 2500 mm, which reveals a linear relationship between the number of steel fasteners and their ability to resist stripping loads within the effective bonding length range.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.029

First Page

181

Last Page

187

Submission Date

March 2025

Reference

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