Experimental Research On The Bending Behavior Of FRP & Steel Fiber Reinforced Concrete Beam

Due to the excellent properties of FRP bars(high strength,light weight,corrosion resistance,low relaxation,easy processing,high fatigue strength,elastic self-recovery,etc.),we can use FRP bars instead of steel to solve the corrosion problem and realize the long life of the structure.Combining the steel fiber reinforced concrete(SFRC)with FRP steel fiber reinforced concrete(SFRC)can not only lighten the weight of the structure,improve the bearing capacity and durability of the structure,but also limit the development of cracks and deformation and improve its ductility.The steel fiber reinforced concrete structure is formed only by adding steel fiber to the section of the beam,which can not only exert the advantages mentioned above,but also reduce the steel fiber reinforced concrete(SFRC)structure with FRP reinforcement.Low engineering cost,has a good application prospect.In this paper,the flexural behavior of six FRP reinforced concrete members with steel fiber volume ratio(0%,0.5%,1.0%,0%,1%),GFRP bars and CFRP bars as experimental variables are tested.The flexural behavior of steel fiber reinforced concrete beams with different steel fiber volume ratio and different types of FRP bars is studied.The failure mode and flexural bearing capacity of steel fiber reinforced concrete beams with steel fiber volume ratio on(partial)steel fiber reinforced concrete beams are discussed,and the bending capacity of steel fiber reinforced concrete beams with different steel fiber volume ratio is discussed.The influence of load-deflection curve,load-maximum crack width curve,average crack width,crack width difference and ductility is established for FR.Calculation method for flexural capacity,stiffness and crack width of P-reinforced steel fiber reinforced concrete beams.Based on the test data and in-depth analysis of its failure mode and characteristics,the following can be obtained.Based on the test data and in-depth analysis of its failure mode and characteristics,the following can be obtained:(1)Because it takes a lot of data to analyze and calculate the ultimate bearing capacity of FRP steel fiber reinforced concrete beams,we need to do the uniaxial compression test of concrete small test blocks and the tensile test of FRP bars and steel bars to provide data support for them in the early stage.(2)the crack load,ultimate load,crack distribution and development,deflection,crack width and failure pattern of 6 experimental beams were observed and recorded.In this paper,the stress,deflection and crack width of FRP bars are analyzed according to the assumption of plane section,which is verified by the analysis of test phenomena and test results.(3)the failure form and characteristics of FRP reinforced steel fiber reinforced concrete beam are analyzed,and the calculation formula of flexural bearing capacity is established and compared with the experimental results.(4)Based on the data measured in the previous bending test,the failure mode of the test beam is deeply analyzed and the formulas for calculating the deflection and cracks of the bending members of FRP reinforced steel fiber reinforced concrete beams are established and compared with the experimental results.