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为了研究冻融循环下ECC+FRP格栅复合加固钢筋混凝土梁的抗弯性能，设计并制作了25根RC梁进行冻融循环后的四点弯曲试验.试验变量为冻融循环次数、ECC强度等级以及FRP种类.研究结果表明：冻融循环对梁的抗弯性能产生不利影响，未加固梁从N0至N200时的屈服荷载和极限荷载均呈下降趋势；相同冻融循环次数下，ECC为C50强度等级的加固梁在屈服和极限荷载方面表现更优；CFRP格栅加固相较于BFRP格栅加固，在抗弯性能上展现出明显优势；ECC与FRP格栅协同工作有效提升了梁的抗弯和变形能力.
Abstract：To study the flexural performance of reinforced concrete beams reinforced with ECC+FRP composite grilles, this paper designed and fabricated 25 RC beams for four point bending tests under freeze-thaw cycles. The experimental variables are the number of freeze-thaw cycles, ECC strength grade, and FRP type. The research results show that freeze-thaw cycles have adverse effects on the bending performance of beams, and the yield load and ultimate load of unreinforced beams decrease from N0 to N200. Under the same number of freeze-thaw cycles, reinforced beams with ECC of C50 strength grade perform better in terms of yield and ultimate load. Compared to BFRP grille reinforcement, CFRP grille shows significant advantages in flexural performance. The collaborative work of ECC and FRP grilles effectively enhances the bending and deformation resistance of the beam.
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基本信息:
DOI：10.16393/j.cnki.37-1436/z.2025.02.010
中图分类号:TU375.1
引用信息:
[1]汪洋.冻融循环下ECC+FRP格栅复合加固钢筋混凝土梁抗弯性能试验研究[J].菏泽学院学报,2025,47(02):109-116.DOI:10.16393/j.cnki.37-1436/z.2025.02.010.
2025-04-15
2025-04-15