Shear Strengthening and Repairing of Reinforced Concrete Deep Beams Damaged by Heat Using NSM–CFRP Ropes

IF 4 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Fibers Pub Date : 2023-04-13 DOI:10.3390/fib11040035

Ahmad Al-khreisat, M. Abdel-Jaber, A. Ashteyat

引用次数: 4

Abstract

This study investigates experimentally the shear strengthening and repairing of reinforced concrete (RC) deep beams damaged by heat utilizing near-surface mounted carbon fiber reinforced polymers (NSM-CFRP) ropes. The main parameters adopted in this research are rope orientation (45°, 90°) and rope spacing (150 mm, 200 mm). For this purpose, ten RC deep beams were cast and tested until failure was reached. The test results showed that using NSM-CFRP ropes with various configurations significantly enhanced the shear capacity for repaired and strengthened deep beams. All the tested beams enhanced the ultimate load capacity for the strengthened beams ranging between 19% to 46%, while for the repaired beams, the values ranged between 40.8% to 64.6%. The CFRP ropes oriented at 45° recorded the highest enhancement result in shear capacity. Notably, all tested beams had a satisfactory rise in the enhancement ratio. Consequently, the economic aspect should have priority.

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NSM-CFRP绳索对热损伤钢筋混凝土深梁的剪切加固与修复

本文研究了利用近表面安装碳纤维增强聚合物(NSM-CFRP)绳索对受热损伤的钢筋混凝土(RC)深梁进行剪切加固和修复的实验研究。本研究采用的主要参数为绳向(45°、90°)和绳距(150 mm、200 mm)。为此，对10根钢筋混凝土深梁进行了浇铸和试验，直到破坏为止。试验结果表明，采用不同配置的NSM-CFRP索对修复加固深梁的抗剪能力有显著提高。加固梁的极限承载力提高幅度在19% ~ 46%之间，修复梁的极限承载力提高幅度在40.8% ~ 64.6%之间。CFRP锚索在45°方向的抗剪能力增强效果最好。值得注意的是，所有测试光束的增强比都有令人满意的上升。因此，经济方面应该优先考虑。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fibers Engineering-Civil and Structural Engineering

CiteScore

7.00

自引率

7.70%

发文量

审稿时长

11 weeks

期刊介绍： Fibers (ISSN 2079-6439) is a peer-reviewed scientific journal that publishes original articles, critical reviews, research notes and short communications on the materials science and all other empirical and theoretical studies of fibers, providing a forum for integrating fiber research across many disciplines. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files or software regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. The following topics are relevant and within the scope of this journal: -textile fibers -natural fibers and biological microfibrils -metallic fibers -optic fibers -carbon fibers -silicon carbide fibers -fiberglass -mineral fibers -cellulose fibers -polymer fibers -microfibers, nanofibers and nanotubes -new processing methods for fibers -chemistry of fiber materials -physical properties of fibers -exposure to and toxicology of fibers -biokinetics of fibers -the diversity of fiber origins