On Edge Stresses Control in Strengthened RC Beams with FRP Strips: Adhesive Layer Profile Effect

Strengthening of steel structures with fiber-reinforced polymer composites

“…A comparison of different modeling approaches was recently presented by Zhang and Teng [81], which illustrates clearly how each assumption affects the predicted interfacial stresses. Stress singularity arises at the bi-material interfaces when a sharp square edge is assumed [45,106] but this issue cannot be properly dealt with by the existing analytical solutions. In real applications, the edge shape can be quite different from a sharp square edge because of the existence of a fillet of excess adhesive which is introduced during the installation process; this change in the edge shape may significantly reduce the interfacial stresses, but it has seldom been appropriately considered.…”

Interfacial stresses in externally FRP-plated concrete beams

“…The significance of their solution is that it is the first solution that satisfies the stress-free boundary condition at the ends of the adhesive layer. Using the same approach, they investigated the effects of an uneven adhesive layer [30] and material nonlinearity [31]. They also evaluated the energy release rate to predict debonding failure [32].…”

Interfacial stresses in externally FRP-plated structures: effect of shear deformations and fiber orientation

“…Previous researches show that glass fiber composites could be effectively used for concrete beam strengthening, resulting in the improvement of flexural load carrying capacity [6][7][8][9][10]. Among all different types of structure strengthening methods, the use of FRP materials for tension face strengthening techniques presents better strengthening characteristic of the ultimate flexural load capacity [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. This paper introduces an original theoretical model for estimating adhesive shear and peel-off stresses and the shear deformations coupled with the thermal effect of an externally bonded FRP plate on the beam tension interface, with different fiber orientations laminate layers, and mechanical properties of the FRP and adhesive materials.…”