This paper proposes a fully nonmetallic system for strengthening RC one-way slabs with prestressed CFRP composites. The flexural behaviors of RC slabs strengthened with nonprestressed and prestressed CFRP strips were compared through four-point bending tests. The externally bonded reinforcement on grooves (EBROG) method was utilized to delay premature debonding of the CFRP composites and was compared with conventional externally bonded reinforcement (EBR). The experimental results indicated a significant enhancement in slabs flexural performance of slabs that were strengthened via the EBROG method and the novel anchorage system. The nonprestressed and prestressed CFRP plates attached using the EBROG method increased the bending capacity by 34% and 77%, respectively, compared with the nonprestressed EBR CFRP plate. Furthermore, the maximum CFRP strain reached 8.9‰ for the nonprestressed EBROG CFRP strip, whereas that for the nonprestressed EBR CFRP strip was only 5.9‰. Thus, the EBROG method delayed CFRP debonding and increased the strain in the reinforcement by 50% compared with the EBR method. In the prestressed CFRP strip, the strain reached 12.4‰ prior to the debonding, confirming the high efficiency of the proposed strengthening system.

本文提出了一种完全非金属的系统，用于用预应力CFRP复合材料加固RC单向板。通过四点弯曲试验比较了用非预应力和预应力CFRP筋加固的RC板的抗弯性能。沟槽上的外部粘结增强材料（EBROG）用于延迟CFRP复合材料的过早脱胶，并与传统的外部粘结增强材料（EBR）进行了比较。实验结果表明，通过EBROG方法和新型锚固系统可以增强平板的抗弯性能。与非预应力EBR CFRP板相比，使用EBROG方法连接的非预应力和预应力CFRP板的弯曲能力分别提高了34％和77％。此外，非预应力EBROG CFRP条带的最大CFRP应变达到8.9‰，而非预应力EBR CFRP条带的最大CFRP应变仅为5.9‰。因此，与EBR方法相比，EBROG方法延迟了CFRP脱胶，并使增强材料中的应变增加了50％。在预应力CFRP带材中，剥离前的应变已达到12.4‰，证实了所提出的加固系统的高效率。