Comparison of Anchorage Systems for Externally Bonded FRP Laminates

Abstract

This paper reports the results of an experimental program to investigate the bonding behaviour of two different types of anchorage systems for externally bonded FRP laminates for strengthening one way RC slab, mechanicaland fiber anchorage system. The overall experimental program consisted of seven flexure tests on RC slab specimens strengthened with a mechanical anchorage system and another seven flexure tests on RC slab specimens strengthened with a fiber anchorage system. The influence of different types of anchorage systems, numbers of anchors and anchor spacing are studied in this paper to evaluate the behaviour of strengthened one-way slabs. The performance of each anchorage system is presented, discussed, and compared in terms of deflection, debonding mode, and failure mode. General from the experimental results, it is found the anchorage system significantly reduces the slab deflections and increases the slab strength and slip capacity, in comparison with unanchored control slabs. The findings indicate that the mechanical technique could represent a better alternative to the fiber anchorage technique because it allows debonding to be more delayed, and hence FRP tensile strength to be better exploited.

Flexural Behavior of RC Beams Strengthened with GFRP Laminate and Retrofitting with Novelty of Adhesive Material

“…On the other hand, the preparation and installation of these anchors greatly increase the difficulty of implementation and the demand for craftsmanship [28,29]. To increase interfacial shear resistance, several indirect anchorage techniques have been created [30,31].…”