FRP Plate To Reinforce The Study Of Shear Performance Of Reinforced Concrete Beam

Fiber reinforced plastic,short for FRP;fiber reinforced composites in China,with its unique advantages: small density,height,good fatigue resistance,and has strong corrosion resistant and not easily damaged,convenient construction and the original components such as characteristic,the effect of section size is minimal from research to the present,many domestic foreign experts and scholars and engineers of FRP strengthening flexural performance of reinforced concrete structure,the shear performance and seismic performance is a lot of experiments and research,and made a number of research results,also has many practical applications,in our country has been gradually applied in the housing project.However,the relative literature on the reinforced concrete beams has been relatively low by now because of the large factor of the reinforced concrete structure.And the existing experimental study of FRP reinforced concrete beam most for side paste,paste and U totally enclosed paste,part of the tilt or paste paste for FRP plate is less;And the formula in the technical specification of carbon fiber reinforced plastics in our country there is no distinction between paste and whole stick,splitting and tensile bar etc.,on the carbon fiber shear ultimate bearing capacity of reinforced concrete structure problem,just put a line of pasting carbon fiber with the shear bearing capacity and the shear capacity of the original beam,but the carbon fiber and original reinforced concrete structure is not simply the maximum bearing capacity at the same time,so the research on carbon fiber shear bearing capacity of reinforced concrete structure of the main problems is to study the shear contribution of carbon fiber.Also,our country is general technical specification gives the formula of carbon fiber sheet,not to make a distinction between plate and the cloth,just for shear reinforcement concrete structure considering the fiber direction and longitudinal vertical component,which leads to the final results of the shear calculation some deviation,even sometimes it is not safe.This paper USES ABAQUS finite element software to simulate the reinforcement of 40 reinforced concrete beams and static analysis,and analyses the influence of several factors on bearing capacity.In this paper,a total of seven different paste way,four different sets of the original beam construction,respectively analyzes the concrete strength,stirrup spacing,FRP paste form the three conditions,the bearing capacity of FRP shear strengthening of reinforced concrete beam.The following is the main research contents and achievements of this paper:1.Based on the reference,adopt the correct concrete,steel,FRP constitutive relation,using ABAQUS software to establish a finite element model of FRP shear strengthening of reinforced concrete beam,complete static load analysis,and comparing with the original,accurate finite element modeling method is put forward.2.Change the simulation component part of the parameters,such as concrete strength,stirrup spacing,to study various factors on the FRP FRP paste form of shear reinforcement effect,the size of the ultimate bearing capacity of reinforced concrete beam in order to verify the various parameters on the reinforced concrete beam cracking load,ultimate load,ultimate displacement and the influence law of steel strain.3.Based on the load-displacement curve obtained,stirrup load and strain curve data,such as influence of FRP is obtained by analysis of shear strengthening of reinforced concrete beam parameters,then comparative analysis,get the influence of these parameters against the shear reinforcement,in with the formula in the technical regulation of carbon fiber reinforced plastics in our country,compared with simulated data verification,verify the advantage of tilt paste.