Concrete beams reinforced by fibre-reinforced plastics: the effect of temperature on the adhesive layer

Composite materials find applications in civil engineering for concrete and prestressed concrete structures. The bending design of these structures can be done with a non-linear calculation method. The research presented aims at determining the long-term behavior of a composite repair. The creep of a composite reinforcement/adhesive-layer interface is evaluated by a tensile/shear thermal/stimulation test and a long-term test. Analysis of the results prove that is possible to study, in a comparative way, changes in adhesive mechanical characteristic loss and the viscoelasticity response of different polymer systems. Long-term mechanical characteristics are evaluated and safety coefficients for design are there by deduced.