Influence factors analysis of the interfacial bond behavior between GFRP plates, concrete. (August 2020)

• Record Type: Journal Article
• Authors: Zhang, Pu; Hu, Yi; Pang, Yuyang; Feng, Hu; Gao, Danying; Zhao, Jun; Sheikh, Shamim Ahmed
• Is Part Of: Structures. Volume 26(2020)
• Page Start: 79
• Page End: 91
• Publication Date: 2020-08
• Subjects: GFRP plate -- Shear key -- Double-lap shear test -- Transverse surface mat -- Load-slip curve; Structural engineering -- Periodicals; 624.1
• DOI: 10.1016/j.istruc.2020.04.005
• Languages: English
• ISSNs: 2352-0124

Abstract

Abstract: The interfacial bond properties between fiber-reinforced polymer (FRP) plates and concrete are critical for FRP plate-concrete composite structures. Numerous researchers have attempted to improve the interfacial bond performance by using innovative techniques. In this study, a new type of interface with a grooved glass fiber-reinforced polymer (GFRP) shear key was developed to analyze the influence factors of the bond behavior between GFRP plates and concrete. For this purpose, four types of GFRP-concrete double-lap shear specimens were manufactured to study the failure modes, ultimate load, interfacial stiffness and load-slip curves under static load. The variables considered were mainly the different FRP plate transverse surface mats, shear key positions, epoxy resin types and concrete strengths. The results showed that the shear key combined with wet-bond (SK-WB) interface exhibits the best bond behavior. The surface roughness and surface mat type of the FRP plate has a great influence on the ultimate load of the GFRP plate-concrete composite interface. A shear key position of 80 mm from the loaded end is recommended for the double-lap shear specimens. Concrete strength has a significant effect on the bond behavior of the dry-bond (DB) interface, the wet-bond (WB) interface and the shear key combined with wet-bond (SK-WB) interface.