A fracture-based model for FRP debonding in strengthened beams

Fracture characterization of concrete/epoxy interface affected by moisture

“…Different fracture-based test procedures have been proposed for the determination of bond properties of composite layered materials. Detailed discussions of these procedures and their applicability for predicting the bond behavior can be found in various publications (Taljsten, 1996;Buyukozturk and Hearing, 1998b;Giurgiutiu et al, 2001;Buyukozturk et al, 2004;Qiao and Xu, 2004;Yuan et al, 2004;Au and Büyüköztürk, 2006a,b;Coronado and Lopez, 2008;Gunes et al, 2009;Lau and Buyukozturk, 2009).…”

Deterioration of FRP/concrete bond system under variable moisture conditions quantified by fracture mechanics

“…The current design guidelines are provided by the ACI Committee 440 [4], which employs design principles similar to that of typical steel reinforced concrete beams. Nonetheless, premature failure by debonding of the concrete/epoxy/FRP bond system may occur, which could significantly affect the load capacity of the retrofitted systems [5][6][7][8]. This failure behavior is undesirable due to its lack of prior indication and brittle nature.…”

Analytical model to predict the lifetime of concrete members externally reinforced with FRP

“…There are many models in the literature to calculate the s b distribution and their maximum, which is herein denoted by s bM [2][3][4]6,9,[11][12][13][14][15][16][17][18][19][20][21].…”

“…Review of current scientific literature shows that extensive research has been published on debonding failure mode. The studies date back to the '60, although the real surge began in the '90 with the introduction of FRP [1][2][3][4][5][6][7][8][9][10][11].…”