Investigation of cracking moment in RC beams with FRP bars

In this paper, has been studied the effect of using FRP bars on the cracking of reinforced concrete (RC) beams. Due to the corrosion of steel bars in the certain condition, the use of FRP bars has been widely considered in recent years. In order to investigate the cracking behavior, fifteen RC beams with steel bars and glass fiber reinforced polymer (GFRP) with different reinforcement ratio were analyzed in ABAQUS software. the experimental results of Al-Sunna et al. have been used For validation, that specimen beam has 2550 mm length with rectangular cross section of 250 × 150 mm. The simulation results showed that the use of GFRP bars due to its linear elastic behavior reduces cracking moment and in RC beams with GFRP bars with increasing concrete cover, cracking moment decrease about 1% -5%. In RC beams with GFRP rebars, the increase in the number of bars layer with a constant reinforcement ratio, cacking moment reduces about 1%- 5% and with concrete strength increase that cracking moment increasing about 15% to 25%.