Axial Compression Behaviors of Concrete Confined by Basalt Fiber Sheets

Abstract

According to the axial compressive experiment of concrete cylindrical and quadrate specimens confined by Basalt fibers, the stress-strain curves, bearing capacity and peak strain were obtained. 12 quadrate and 12 cylindrical column specimens were prepared and wrapped with 2 to 4 layers of BFRP fibers. The results show that: (1) comparing with unconfined specimens, the compressive strength and peak strain of the specimens confined with Basalt fibers are improved significantly, not only cylindrical but also quadrate; (2) the compressive strength increases with the number of BFRP layers; with equal number of confinement layers, the compressive strength and peak strain of cylindrical specimens is higher than that of quadrate; (3) the wrapped fiber of quadrate specimens are more likely to rupture at the corners of specimen. Meanwhile, the compressive strength models of specimen confined by Basalt fibers were proposed, the theoretical values are in good agreement with the test data.