Three Dimensional Shear Stress Along Bonded Interface between Fiber Reinforced Plasticplate and Concrete

摘要

The bonded interface between fiber reinforced plastic (FRP) plate and the concrete members is a key part while reinforcing the concrete structures with FRP plates. Under some external loading conditions, this interface was oftenin the direct shear action. Therefore, accurate measurement and analysis of interfacial shear stress distribution was the precondition of FRP plate reinforced concrete structural design. The ASTM D905 shear specimens were improved, the shear test of the bonded FRP-concrete interface was simulated by using three-dimensional finite element method, and the shear stress distribution was obtained. The stress distribution characteristics on the interfacewas discussed, the stress concentration factor (SCF) for the characterization of specimen actual shear strength was well obtained. The resultswill play an important role on the study the interfacial fracture by thestress concentration in gaps.