Bending and axial behavior of circular concrete-filled GFRP tube with GFRP bars

The paper presents the analytical and experimental investigation to predict strength of concrete-filled glass fiber-reinforced polymer (GFRP) circular tubes reinforced internally with six GFRP bars (10mm nominal diameter) under axial load and four-point bending. The experimental studies included four GFRP bar-reinforced GFRP tube specimens with 134mm outer diameter and 536mm length, two concrete-filled GFRP cylinder tubes with height of 300mm.