FLEXURAL BEHAVIOUR AND BOND-DEPENDENT COEFFICIENT OF BASALT FRP BARS IN CONCRETE BEAMS

摘要

This paper presents an experimental study aimed at determining the bond-dependent coefficient (fa) and investigating the flexural performance of concrete beams reinforced with ribbed basalt fiber-reinforced polymer (BFRP) bars. The performance of the BFRP-RC concrete beams is compared against that of GFRP-RC ones. A total of five concrete beams measured 200 mm wide × 300 mm deep × 3100 mm long were constructed and tested in four-point bending over a clear span of 2700 mm. The main variables were reinforcement type (BFRP, GFRP, and steel bars as reference) and reinforcement ratio. The test results showed that the average fa was 0.85 for the ribbed BFRP bars. The fa value of ribbed BFRP bars was lower than 1.0 recommended by the Canadian Highway Bridge Design Code, CHBDC (CSA S6-14).