Abstract
Despite the potential interest for civil engineering structural applications, few studies have explored the feasibility of employing carbon fibre cords as prestressed elements in strengthening systems. This research presents a large experimental campaign to investigate the tensile behaviour of straight carbon fibre cords connected to a bond-type anchorage. Specifically, 78 tensile tests have been performed varying several parameters: anchorage geometry, resin type, cord cross sectional area, and fibre free-length and treatment (unimpregnated or impregnated with resin). The results shed light on their role on the structural response, and highlight the existence of size effects regarding fibre free-length and cross sectional area of the cord. These phenomena are magnified in unimpregnated specimens, and, de facto, may prevent their use in full-scale post-tensioned applications.
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