Experiment on seismic performance of prestressed CFRP tendons and rebars-steel reinforced concrete eccentrically tensioned members

In order to investigate the seismic performance of prestressed carbon fiber reinforced polymer (CFRP) tendons and rebars-steel reinforced concrete (SRC) eccentrically tensioned member, the low reversed cyclic loading tests of four members of prestressed CFRP tendons-SRC eccentric tension, 4 members of prestressed rebar-SRC eccentric tension and 3 members of ordinary SRC tension were conducted. The test parameters include eccentricity, prestressed tension level, vertical force and the types of prestressed tendon. The results show that the failure modes of all the members are bending shear failure, and the hysteretic curves of all the members are full and the ductility is good. With the increase of eccentricity, the bearing capacity, ductility and energy dissipation capacity of each component decrease accordingly. With the increase of the prestress tensile level, the bearing capacity of the component increases to a certain extent, but the energy dissipation capacity decreases, and the ductility coefficient increases first and then decreases, and the increase range is greater than the decrease range. With the increase of vertical tensile force, the bearing capacity, ductility and energy dissipation capacity of the prestressed CFRP tendons-SRC eccentric tensile member decrease correspondingly. Compared with the ordinary SRC tensile member, the prestressed CFRP tendons-SRC eccentric tensile member has better bearing capacity, stiffness, ductility and crack resistance, but lower energy consumption capacity. Compared with the prestressed rebar-SRC eccentric tensile member, the prestressed CFRP tendons-SRC eccentric tensile member has lower bearing capacity and ductility, but higher energy dissipation capacity.