Abstract
Carbon fiber-reinforced polymer (CFRP) grid-reinforced engineered cementitious composites (ECC) with excellent cracking resistance was used to replace the tension part of concrete beams to improve the beam durability and flexural performance. A new ultradurable hybrid beam type was proposed for marine environments, consisting of a CFRP grid-reinforced ECC layer as a stay-in-place formwork and an overlying concrete part reinforced with glass FRP (GFRP) bars. One reference concrete beam, one hybrid beam using a pure ECC formwork, and eight hybrid beams using CFRP grid-reinforced ECC formworks were tested to evaluate the effects of ECC and CFRP grid presence, grid spacing, CFRP grid cross-sectional area, GFRP bar reinforcement ratio, and ECC strength. Test results revealed that CFRP grid-reinforced ECC formwork substantially improved the cracking load by 53.4%–92.4% and the maximum load by 4.4%–34.4% (except the low-reinforcement-ratio beam) compared with the reference beam. The cracking performance and load-carrying capacity increased with ECC and CFRP grid incorporation, an increasing GFRP bar reinforcement ratio, and a CFRP grid area increase and spacing reduction. The ECC strength had no obvious effect on the cracking performance or load-carrying capacity. No interfacial slippage before ultimate capacity was observed in most beams, demonstrating full composite action.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
