Experimental studies on the shear capacity of sea sand concrete beams with basalt fiber-reinforced polymer bars

摘要

Basalt fiber-reinforced polymer (BFRP) bars can replace steel bars in sea sand concrete structures to prevent the corrosion of steel by chloride ions; thus, sea sand can be directly added to concrete material in construction. Shear tests on 16 sea sand concrete beams with BFRP bars (including ten beams with stirrups and six beams without stirrups) are performed, and their failure modes, shear capacities and influencing factors are analyzed. The results reveal two main failure modes for sea sand concrete beams with BFRP bars: bending failure and shear-compression failure. The shear capacity increases with the concrete strength and stirrup ratio but decreases with an increased shear-span ratio, and the longitudinal reinforcement ratio has an insignificant effect on shear capacity.