This study presents a detailed experimental program for reinforced concrete T-beams strengthened in shear with near-surface mounted (NSM) basalt fiber-reinforced polymer (BFRP) bars. This paper aims to introduce and evaluate a nonmechanical anchorage technique for shear strengthening using NSM-BFRP bars. T-beams were strengthened using manually manufactured closed or U-shaped hybrid BFRP stirrups (BFRP bars and BFRP sheets). The experimental program was developed to study the effects of these anchorage techniques. The results showed that the shear capacity increased by 8%–46% for beams strengthened with NSM-BFRP bars without anchorage. However, the presence of the proposed anchorage system increased the shear capacity of the strengthened beams by 39.6%–81.6%. Moreover, the maximum strains induced in the BFRP bars ranged from 27 to 59% of their ultimate strains according to the spacing between the NSM and the presence of the anchorage. The proposed anchorage technique prevented the premature debonding of the NSM-BFRP bars.

中文翻译：

---

使用 NSM-BFRP 钢筋和 BFRP 薄板对 RC T 梁进行抗剪加固的锚固技术

本研究提出了一个详细的试验计划，用于用近表面安装 (NSM) 玄武岩纤维增强聚合物 (BFRP) 钢筋进行剪切加固的钢筋混凝土 T 梁。本文旨在介绍和评估一种使用 NSM-BFRP 钢筋进行剪切加固的非机械锚固技术。T 型梁使用手工制造的闭合或 U 形混合 BFRP 箍筋（BFRP 钢筋和 BFRP 板）进行加固。开发实验程序是为了研究这些锚固技术的效果。结果表明，使用无锚固的 NSM-BFRP 钢筋加固的梁的抗剪承载力增加了 8%–46%。然而，所提议的锚固系统的存在使加固梁的抗剪承载力增加了 39.6%–81.6%。而且，根据 NSM 之间的间距和锚固的存在，BFRP 钢筋中引起的最大应变范围为其极限应变的 27% 到 59%。建议的锚固技术防止了 NSM-BFRP 钢筋过早脱粘。