The Design Method Research Of FRP Flexural Reinforcement RC Beams With The Fiber Anchors

Because the influence of structure aging, natural disasters and other factorsmany of thebuildings need to be repaired and reinforced, so various reinforcement methods be generatedaccordingly. With the development of composite material and its advantages of high strength,corrosion resistance and light weight, etc, FRP reinforcement technology is applied more andmore widely, but early debonding damage seriously affected the development of FRPstrengtheningtechnique. Early debonding damage greatly reduces the reinforcement effect, oreven disables reinforcement. So how to prevent and delay the happening of the debonding hasbecome the important research issues of international scholars in recent years. Through theexperimental study and finite element simulation analysis, international scholars have madefruitful achievements and proposed various anchoring methods. One of the methods is thefiber anchors beams strengthened with FA-FRP. But most of the existing literature isexperimental study on fiber anchor pullout, and there was serious a little of them was appliedin reinforced concrete beam, the progress research of fiber anchor about the flexural capacityof FRP beams with smaller anchorage. Therefore, we use the simulation method establishedelement analysis model combined with the test model, and proved the reasonableness by thecomparison with the test model. By the way of finite element model, the flexural capacity ofFA-FRP has been studied; the main research contents are as follows.Firstly, this paper described the various methods of reinforcement theory, especially thetheory of CFRP reinforcement technology, and introduced the various research methods ofdebonding failure. Detailed descried the bonding properties between FRP and concrete, thedebonding failure mechanism of FRP and debonding strength model.Secondly, introduced the theory of the finite element and the selection of the element type,solid models and the material constitutive, and the key problems in the modeling process aredescribed in detail also. Through the solid models’ simulation the finite element models wereestablished, and a group of FA-FRP test beams’ finite element models were established bychanging the influence factors, and then based on the finite element simulation results,analyzed the test beams’ load-deflection curve, the stress changes of the FRP anchor as well as its surrounding concrete stress.Finally, according to the analysis and study of existing, analyzed the mechanism of actionof the FA-FRP reinforcement technology, then combined with the existing EB-FRP calculationmethod and used the finite element data, I fitted the FA-FRP flexural capacity designequations.