NUMERICAL SIMULATION OF FLEXURAL PERFORMANCE OF CFRP AND STEEL FIBER REINFORCED CONCRETE BEAMS
By the advantages in terms of strength,weight,and corrosion resistance,CFRP bars are gradually applied to replace steel bars in building structures.To improve the flexural performance of the model beam,different volumes of recycled steel fibers from waste tires are mixed into the model beam,the properties of which are evaluated by four-point flexural and displacement loading methods,and numerical analyses are carried out using the ABAQUS software. The results show that the ultimate stress of CFRP bars is significantly higher than that of conventional steel bars. With the increase of the amount of recycled steel fiber,the internal bridge between fiber and concrete is more obvious,which effectively prevents crack expansion,increases the tensile damage performance of the model beam,and improves the bending capacity of the beam as a whole.