Anlysis On Bearing Performance For Strengthening The Reinforced Concrete Beam With Bonded FRP Sheet

FRP material has high strength, light weight, fatigued, corrosion resistance as well as the advantages of easy and simple construction.so now applied on reinforcing concrete buildings and other buildings. Currently, the most commonly used method in construction reinforcement for FRP is bonded FRP sheet reinforcement method,namely the use of structural plastic bonded to make the FRP sheet directly on the surface of the reinforced structure. FRP reinforcement in concrete FRP- interface is the weakest part, and therefore more prone to FRP- damage early peeling concrete interface. Therefore, in order to avoid early onset FRP- concrete interface debonding someone proposes a new FRP sheet bonded anchor technology, using friction and principles glued, this new type of bond anchorage reinforcement methods, and other reinforcement methods comparison, there are many outstanding advantages.This article will use the ANSYS finite element to analysis on the concrete beam anchor adhesive layer stress of using the new technology,and compared.with the anslysis result of using a single layer of adhesively bonded reinforcement.And the concrete adopts nonlinear constitutive and considers cracking and crushing, FRP materials using linear elastic constitutive, bonding interface using nonlinear spring, both the single bonded reinforcement methods and new bond anchorage reinforcement methods were used on reinforced concrete beams reinforcement, and establish the FRP reinforced concrete beam finite element analysis model. Meanwhile, analysis the new bond anchorage reinforcement method parameter and draw some conclusions provide a theoretical reference for future research related tests a nd practical application. The conclusion is as follows:(1) by taking the new anchor reinforcement method canimprove the ultimate bearing capacity of members;(2) the new anchor reinforcement method can increase the carrying capacity of the adhesive layer bonding and can effectively reduce the generation FRP debonding;(3) Compared the new anchor reinforcement method with single bond reinforcement methods contrast, the former can significantly improve the mechanical properties of the interface concrete specimens;(4) Compared the new anchor reinforcement methods with single bond reinforcement methods can increase FRP sheet material utilization.