Quasi-static Test Research On Seismic Performance Of RC Frame Retrofitted With Hybridized CFRP

Cast-in-place reinforced concrete structure is generally described as "strong beam andweak column" structure. These structures are always poor in seismic performance, thusbecoming hidden security problem that can not be ignored. Therefore, actual study of theseismic performance of such structures and reinforcement approach is essential.Firstly, the paper introduced the design and production of common specimens andreinforcement specimens, in comparion with the failure pattern of two kinds of specimensunder low reversed cyclic. Then according to the comparison result of collected strain ofsteel column and beam steel bars,it can be seen that column reinforcement stress isrelatively larger while the beam stress is relatively small. Strong beam and weak columncharacteristic is shown in specimens. After reinforcement, stress of reinforced bars is lessin column while that of the beam is increased at the same time. Achieved the expectationof strong column weak beam effect. The paper also analyzed the hysteresis curves,skeleton curves, displacement ductility, rigidity degeneration, energy dissipation capacityon two different kinds of specimens. Results show that: compared with normal specimens,carbon fiber reinforced ones has better energy dissipation ability and ductility, while atthe same time stiffness of reinforced specimens is better. Seismic performance ofspecimens is improved.In addition,the paper also carried out the theoretical research and calculationanalyzis, analysed the influence of carbon fiber reinforced hinge pillar critical force onboth ends and the influence of carbon fiber reinforced plastics components after thechange of the stiffness matrix,it is learned that carbon fiber reinforcement pasted at theend of the column can improve critical force and stability of column, and at the sametime, the stiffness of column after reinforcement is also improved.