The present study aims to investigate the efficiency of application of steel fiber-reinforced self-consolidating concrete (SFR-SCC) jackets for strengthening RC beams in flexure and shear. Accordingly, 10 beam specimens were constructed and categorized under two main groups. In the first group, the specimens were designed in a way that shear failure was dominant so that the effectiveness of SFR-SCC jacketing in shear strengthening could be evaluated. In contrast, specimens of the second group, designed with high amount of shear reinforcement, were strengthened with SFR-SCC jackets containing 2 GFRP rebars for the purpose of flexural strengthening. Parameters studied in this paper include the use of different steel fiber dosages, the effect of presence of shear reinforcement, utilization of GFRP rebars in the jackets, and behavior of specimens with different longitudinal reinforcement ratios. In the second group, failure mode of the strengthened specimens changed to flexure, while in the strengthened specimens reinforced with GFRP rebars, mode of failure changed to a combination of shear and compression.

本研究旨在研究应用钢纤维增强自固结混凝土（SFR-SCC）护套来增强RC梁的弯曲和剪切效率。因此，构造了10个梁样本并将其分为两个主要类别。在第一组中，标本的设计以剪切破坏为主导，因此可以评估SFR-SCC护套在剪切加固中的有效性。相比之下，第二组的标本采用大量抗剪增强设计，并通过包含2个GFRP钢筋的SFR-SCC护套进行了抗弯加固。本文研究的参数包括使用不同剂量的钢纤维，存在抗剪增强的效果，夹克中GFRP钢筋的使用，不同纵向增强比的试样的性能和行为。在第二组中，加固试样的破坏模式变为弯曲，而在用GFRP钢筋加固的加固样本中，破坏模式变为剪切和压缩的组合。