Bond-slip behavior of fiber reinforced polymer strips-steel interface: Fid-Bau Portal

Bond-slip behavior of fiber reinforced polymer strips-steel interface

He, Jun / Xian, Guijun

Highlights•Single-lap shear tests on CFRP-to-steel joints using a linear adhesive.•A review of existing bond-slip models is conducted.•A new bond-slip model is developed.•The developed model is proved to be accurate according to numerical analysis.

AbstractFiber reinforced polymer (FRP) composites have been widely and successfully applied for externally bonded strengthening of steel structures. The bond between FRP and steel substrate plays a key role on the strengthening effectiveness of FRPs. The bond-slip relationship is essential to understand the mechanisms involved in the bond failure process. This paper experimentally studied the bond behavior of carbon fiber reinforced FRPs (CFRP)-to-steel joints through a single-shear lap testing method. The load-displacement relationship and bond-slip relationship were firstly presented. In addition, a new bond-slip model was developed based on observed experimental behavior of strengthened components. According to the developed bond-slip model, a computed result of the load-displacement relationship was obtained using numerical analysis method by ANSYS software. Comparison between computed and experimental result of the load-displacement relationship showed a good accordance, indicating the reliability of the developed bond-slip model. Finally, comparison of computed results obtained from the developed model and the existing models demonstrated that the proposed model was more accurate than the existing models.