The Test Study About Strong Knitting Polyester Fiber Bar Impact The Concrete Beam’s Deflection Performance

In this paper, there are1plain concrete beam,2reinforced concrete beams,8strongknitting polyester fiber reinforced concrete beams and2strong knitting polyester fiber andrebar hybrid concrete beams as the experimental subject. To experiment and contrast withthem. The main contents include the following two aspects:1.Take1plain concrete beam and1reinforced concrete beam as benchmark beams, take6strong knitting polyester fiber(don’t add the glue) reinforced concrete beams and2strongknitting polyester fiber(add the glue) reinforced concrete beams as test beams, and use themto test. According to observe and contrast their cracking load, ultimate load, the developmentsituation of crevice, deflection, failure mode and so on, we can learn:①The improvement of strong knitting polyester fiber(don’t add the glue, type A)reinforced concrete beams are less than strong knitting polyester fiber(add the glue, type J)reinforced concrete beams as test beams.②the failure mode of strong knitting polyester fiber(add the glue, type J) reinforcedconcrete beams as test beams is different from strong knitting polyester fiber(don’t add theglue, type A) reinforced concrete beams. Strong knitting polyester fiber could change thefailure characteristic of beam. Because of the Strong knitting polyester fiber, when theconcrete crack, which locates the deep of the beam; the deformation capacity of beamincreased and have obvious signs. And the deflection of strong knitting polyester fiberreinforced concrete beam is higher than plain concrete beam. ③the number of cracks of strong knitting polyester fiber(add the glue, type J)reinforced concrete beams is more than plain concrete beam, which proved strong knittingpolyester fiber could increase the capability of dispersion crack.④Although strong knitting polyester fiber (add the glue, type J) is better than strongknitting polyester fiber (don’t add the glue, type A) in concrete beams, but it couldn’t insteadof rebar to be the load-bearing bar in concrete beam.2. Take1reinforced concrete beam as benchmark beams, take2strong knitting polyesterfiber and rebar hybrid concrete beams as the experimental subject. From this part could getthe conclusion that strong knitting polyester fiber could improve the beam’s capacity ofresistance to deflection and could increase the beam’s deflection in reinforced concretebeams.