The Study On Mechanical Behaviors Of Concrete T-Beams Prestressed With CFRP Tendons

Since the emergence of fiber-reinforced polymers(FRP),many bridge engineers have attracted more and more attention due to their high strength,light weight,corrosion resistance and other good characteristics.Reinforced concrete structure is prone to corrosion,will greatly affect its durability,and its weight is relatively large.The birth of FRP provides a very good idea for dealing with this problem.Because FRP material has high axial tensile strength,it is worthwhile to use FRP prestressed tendons for prestressed concrete structures.This paper focuses on the use of simulation analysis method to establish CFRP-PSC T-beam model,and then its performance analysis,the main research content and conclusions are as follows:1?This paper summarizes the material properties of FRP tendons,the current research situation at home and abroad and its application in the field of bridges.Then,the equilibrium reinforcement ratio,cracking moment,ultimate bending moment,ductility index,deflection and The calculation theory of cracks.2?The ANSYS finite element numerical analysis based on the existing AFRP-PSC component test model is carried out to prove the accuracy and applicability of the software to the AFRP-PSC component.3?The influence of CFRP-PSC T beam on the ductility and performance of CFRP-PSC T beam is analyzed by ANSYS.For example,the reinforcement ratio of CFRP tendons,the tensile stress of CFRP tendons,the reinforcement ratio of non-prestressed steel bars,the strength of concrete,as well as the combination of reinforcement form.The influence of each factor on the force behavior of each T-beam is studied,and then the design of CFRP-PSC T beam is taken into account.The results of the study and give their own advice.