Performance of a transfer beam with hybrid reinforcement of CFRP bars and steel bars under reversed cyclic loading

• Main Authors: Chen Jin, Jiang Shiyong, Zeng Xiangrong, Zhou Ling, Sun Tao, Yao Kai, Zhang Lei
• Format: Article
• Language: English
• Published: De Gruyter 2017-07-01
• Series: Science and Engineering of Composite Materials
• Subjects: carbon fiber reinforced plastic bars; hybrid reinforcement; reversed cyclic loading; seismic performance; transfer beam
• Online Access: https://doi.org/10.1515/secm-2015-0035

Hybrid carbon fiber reinforced plastic (CFRP) and steel bar reinforcement concrete were applied in a transfer beam. Three specimens (ZHL-2, ZHL-3, and ZHL-4) corresponded to different forms of reinforcement, reinforcement ratio, and reinforced root number, respectively. The pseudo static test of the three specimens was carried out under the condition of vertical loading and horizontal reversed cyclic loading. The flexural property and failure mode of the transfer beams were demonstrated. Further, the ductility, energy dissipation capability, hysteretic characteristics, structural yield mechanism, and failure mechanism were also studied. The exploration of these factors was aimed to study the bearing capacity and seismic performance of the transfer beam with hybrid CFRP and steel bars. The test results show that if both the upper and lower longitudinal reinforcements were replaced by CFRP bars with a symmetrical reinforcement, the mechanical property and deformation performance would be superior. The performance would be better than the reinforcements with single upper and lower replacement by CFRP bars. Both the upper and lower longitudinal bars of the transfer beam should be replaced by CFRP bars with a symmetrical form of reinforcement. The ductility performance would be better for the transfer beam with the hybrid reinforcement of CFRP bars and steel bars. It showed a seismic performance. The transfer beam with the hybrid reinforcement of CFRP bars and steel bars could meet the design requirements for the ductile frame “strong column, weak beam and strong node.”