Experimental Analysis On Anchor Bond Properties And Bending Carrying Capacity Of FRP-bolt Joint Reinforcement

Concrete structure protection and reinforcement technique currently has caused worldwide concern, and FRP-bolts joint reinforcement technique is one of the most effective methods to solve this problem. FRP-bolt joint reinforcement method is a new hybrid reinforcement method for the damaged concrete structure, which offers a more safe, efficient, convenient and economic new technology for the maintenance and reinforcement concrete structures, and it is of important significance in both theoretical and practical in Improving the bearing capacity of the concrete, and prolong the service life. Because the technology is at the early stage of development, the research results of its key technology parameters on mechanical properties, construction technology are basically blank, therefore, the systematic research of FRP-bolt joint reinforcement technique has obvious innovation.In order to better play the advantage of the FRP reinforcement technique, improving the defects of the traditional surface stickup of FRP reinforcement technique, solving the problem of insufficient in the bond strength of FRP and concrete, this paper studied both the anchor bond properties and anti-flex properties of FRP-bolts joint reinforcement technique based on the FRP-bolts joint reinforcement technique, comparing with the traditional FRP reinforced concrete technology. The study provides basis for popularizing of FRP-bolts joint reinforcement technique.Through a lot of precast beams to determine the shear tests of FRP-bolt joint reinforcement technique method bond properties technical parameters, by using ANSYS calculation software, bolt pre-tightening unit and face-to-face contact analysis, and simulating different bolts of prestressing force of joint bolt FRP-under the condition of strengthening the bond experimental beams shear stress distribution, finally puts forward the calculation formula of FRP paste length.Through the laboratory test and analysis of the results, comparing different reinforcement method of beam load curve, and beam crack deflection, the ductility of the load, beam of crack development regularity and beam, made clear the partial-quenched of liang FRP-bolt joint reinforced concrete beam bending reinforcement effect.