Abstract
An experimental program was conducted to examine the bond characteristics of carbon fiber reinforced plastic prestressing strands in pretensioned concrete beams. The bond characteristics are examined through measurements of the transfer and development lengths as well as their corresponding bond stresses for 12.5 mm diameter and 15.2 mm diameter seven-wire carbon fiber composite cable (CFCC) strands. Twenty prestressed concrete beams pretensioned by CFCC strands were constructed and tested using different shear span values. This paper proposes equations to predict transfer and flexural bond lengths for CFCC strands. The proposed equations are in good correlation with the measured values. This information is important for the design of concrete structures prestressed by CFCC and provides data for the development of design considerations and codes for concrete beams pretensioned by CFCC strands.
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