New Anchorage Technique for GFRP Flexural Strengthening of Concrete Beams Using Bolts-End Anchoring System

Abstract

The concept of external glass FRP composite confinement is a current process for strengthening concrete beams subjected to static loads. End anchorage glass FRP composites of 80 mm width and 90–130 mm length with different thicknesses (2.4 and 4.8 mm) have been fixed at the bottom of beams with bolts of various diameters (6 and 10 mm). For this purpose, the behavior of beams strengthened with bolt-end anchoring glass fiber polymer composites (BEGFPC) has been analyzed. It is concluded that the load capacity of the BEGFPC beams is improved by increasing the end-anchorage glass FRP composite thickness (about 98–188%). In addition, the BEGFPC system with bolts of 6 mm diameter has significantly improved the flexibility of beams. In contrast, the 10 mm bolts in diameter give a high ultimate load, whatever their quantity. Therefore, combining bolts with diameters of 6 and 10 mm would be the best solution for increasing the ultimate load and ductility of the retrofitted beams. Depending on the number and bolts' arrangement, there is also an enhancement in the crack patterns by changing from intermediate flexural failure to shear failure in beams.

Numerical modeling of RC column reinforced by new strategy using fiberglass tape and cloth

“…-Pioneering innovative techniques for structural strengthening and rehabilitation where engineers have devised various methodologies to enhance the seismic resilience of existing structures. They include retrofitting with bracing where bracing systems, comprising beams and struts are strategically employed to reinforce structural walls and frames (Abdelhamid et al, 2022 And using the concrete confinement by FRP composites composed of fiber-reinforced polymers, utilized to strengthen concrete columns and beams (Yahiaoui et al, 2023;.…”