关键词: CFRP-PCPS复合筋, 钢筋混凝土梁, 抗弯性能试验, 预应力, 计算公式

Abstract: The article, through static test of the 7 concrete beam specimens, compares the bearing capacity, deflection, crack of the reinforcement concrete beam, common prestressed CFRP reinforcement concrete beam, CFRP-PCPs reinforcement concrete beam and CFRP-PCPs reinforcement concrete beam of different prestresse level of CFRP reinforcement. The research results show that the normal use stage of CFRP-PCPs reinforcement concrete beam′s deflection and crack satisfy the use requirement of structure safety. And, CFRP-PCPs reinforcement concrete beam can effectively overcome the disadvantage of large deflection and crack width of common prestressed CFRP reinforcement concrete beam. Further, CFRP-PCPs reinforcement can effectively delay the crack propagation of traditional prestressed CFRP reinforced concrete beam, increase the overall stiffness and strength of component, improve ductility and make full use advantages of CFRP materials. Based on the related experimental results, this paper puts forward the design and calculation method of flexural bearing capacity,crack width and deflection of CFRP-PCPs reinforced concrete beam. The results show that the calculated value can agree well with the test results.

Key words: CFRP-PCPS reinforcement, reinforced concrete beam, static test, prestress