Abstract
Fiber reinforced polymer (FRP) composites are currently used as reinforcement for concrete structures where durability or magnetic permeability is the controlling parameter. Carbon fiber reinforced polymer (CFRP) grid reinforcement represents a suitable replacement for steel rebars in some concrete structural members subjected to aggressive environmental conditions that accelerate corrosion of the steel reinforcements and cause deterioration of the structures. This paper presents the flexural behaviour of three one-way concrete slabs reinforced with CFRP grid reinforcements in comparison with that of one with steel reinforcing rebars. The slabs had the same size of 3300 × 1000 × 250 mm, but with different reinforcement ratios. They were simply supported and tested in the laboratory under static and cyclic loading conditions to investigate their flexural and shear limit states, including pre-cracking behaviour, cracking pattern and width, deflections, ultimate capacities and strains, and mode of failure. The effect of the transverse bars in the grid on the cracking and the cracking moment is indicated. Based on this investigation, design recommendations and guidelines are proposed.
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