Experimental Investigation on Fatigue Behaviour of Basalt Fibre Reinforced Polymer (Bfrp) Bars

The tension-tension fatigue behaviour of sand-coated basalt fibre reinforced polymer (BFRP) bars was studied in this paper. The fatigue test was carried out at a stress ratio (R),𝜎𝑚𝑖𝑛/ 𝜎𝑚𝑎𝑥= 0.1 subjected to constant amplitude loading as per ASTM D3479-02.The loading frequency of this experiment was 5 Hz. The debonding of fibre/matrix interface was observed using scanning electron microscopy (SEM).The experimental test results were presented in the form of S-N curves, showing that the sand-coated BFRP bars have better fatigue performance than conventional steel bars. Keywords: ASTM standards, BFRP bars, Steel bars, Fatigue behaviour