Study On Frp Posted With Angle Steel-Concrete Plus Armpit Combined Strengthening Joint

Since the emergence of reinforced concrete structures, there have been 160 years of history.During this time,when the concrete and steel bar cooperate with the use of its good material properties of the play makes the construction structure can develop rapidly,but can not be ignored is that the early reinforced concrete structure due to architectural design specification is not perfect,and the grade of the reinforced and the concrete is generally lower than now grade,so when used for years later,the structures appears cracking, tilt and other security risks,or because of the modified structure cases caused the structural earthquake resistance and the bearing capacity of the structure is reduced.Therefore, whether the reinforcement is effective or not has become a major issue of civil engineers in the 21 th century.Nowadays,because of its high strength, good durability, less influence on the effect of building facade and the advantages of simple construction etc,the fiber reinforced polymer has been widely studied by domestic and foreign engineering experts.Recent study shows that either in flexural or shear reinforcement,fiber reinforced polymer reinforced concrete beams and columns,the reinforcements is excellent,but for the composite component such as the joints of beam and column,or because of construction technology,or because of the theoretical and technical combination is not complete,the study was slow,this has also become a barrier for the promotion of fiber reinforced polymer.According to the defects existing in the traditional reinforcement, in order to check with the reinforcement effect of traditional concrete and angle steel,and the advantage of the high tensile strength of fiber sheets,so this article use the type of L,horizontal and vertical ring package and diagonal cross ring package on the core area of the T node of beam and column.The purpose of L is to improve the bending resistance of the beam column joints,the ring package of end of beams and columns is to up the shear strengthening,the way of diagonal cross ring package can be used to strengthen the core area while fixing the concrete simultaneously.By the using of carbon fiber sheets,Not only the shear bearing capacity of the joint was significantly improved,but the the core area deformation ability got obvious improvement,obvious Aura has come out before the destruction.Based on Experiment process,In this article, the results of the finite element analysis software compared with the experimental data,the simulation results was close with the data of experiment,and the simulation was full of safety.