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Efficacy of FRCM systems in flexural strengthening of RC T-beams

机译:FRCM系统在RC T梁弯曲强化中的功效

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This paper presents an experimental study on the flexural behaviour of RC beams strengthened with fabric reinforced cementitious matrix (FRCM) system. Eight T-shaped RC beams with two different flexural reinforcement ratios (ρ_s=0.40%and ρ_s=1.02%) were constructed and tested as simply supported under monotonic three-point loading. Two beams were kept unstrengthen to act as references while the remaining six beams were strengthened with different types and geometric schemes of FRCM system. Three different test parameters have been considered: (a) FRCM type (carbon and glass), (b) FRCM strengthening scheme (side bonded versus U-shaped scheme), and (c) internal flexural reinforcement ratio. The strengthening system increased the ultimate load carrying capacity by 16.52 - 46.73% in carbon FRCM strengthened beams and 4.84 - 29.41% for glass FRCM strengthened beams relative to the reference beams. The strengthening performance of FRCM system decreased with an increase in the amount of internal flexural reinforcement. Moreover, U-shaped strengthening scheme performed better than the sided bonded counterparts in terms of the gain in the ultimate load and failure modes.
机译:本文介绍了织物增强水泥基质(FRCM)系统强化RC梁弯曲行为的实验研究。构建和测试具有两个不同弯曲增强比(ρ_s= 0.40%和ρ_s= 1.02%)的八个T形RC梁(ρ_s= 0.40%,ρ_s= 1.02%)。两个光束保持不高度,以充当参考,而剩余的六个光束是用不同类型和FRCM系统的几何方案加强的。已经考虑了三种不同的测试参数:(a)FRCM型(碳和玻璃),(b)FRCM强化方案(侧粘合与U形方案),(c)内部弯曲加强比。强化系统在碳FRCM加强梁中增加了16.52-46.73%的最终载荷容量和玻璃FRCM相对于参考光束的玻璃FRCM加强梁的4.84-29.41%。随着内部弯曲增强量的增加,FRCM系统的强化性能下降。此外,在最终负载和故障模式中的增益方面比侧面粘合对应物更好地执行U形强化方案。

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