Behavior of normal and recycled aggregates beams strengthened with different types of externally bonded shear reinforcement

Jamal A. Abdalla , Rami A. Hawileh , Maha Ass'ad , S.S. Ahmed , A. Omer , O. Abdulkadeer
{"title":"Behavior of normal and recycled aggregates beams strengthened with different types of externally bonded shear reinforcement","authors":"Jamal A. Abdalla ,&nbsp;Rami A. Hawileh ,&nbsp;Maha Ass'ad ,&nbsp;S.S. Ahmed ,&nbsp;A. Omer ,&nbsp;O. Abdulkadeer","doi":"10.1016/j.prostr.2024.01.125","DOIUrl":null,"url":null,"abstract":"<div><p>This study aims at investigating the effect of strengthening shear-deficient recycled aggregate concrete (RAC) beams with carbon fiber-reinforced polymer (CFRP) laminates. Five RAC beams were cast, four of which were strengthened with different CFRP shear strengthening configurations: U-wraps bonded at 45°, vertical U-wraps, continuous U-wraps along the shear span, and side-boned laminates. In addition, one RAC specimen was left unstrengthened to act as a benchmark specimen. For comparison purposes, an additional five normal aggregate concrete (NAC) beams were cast, three of which are strengthened with similar CFRP schemes as that of the RAC, and one was left unstrengthened. All beams are loaded under four-point bending tests, and the results in terms of shear force-deflection graphs and failure modes are analyzed and compared. Experimental results indicated that the shear force values obtained in NAC and RAC beams are comparable. In fact, the percentage increase in the shear strength compared to the respective control beam was higher for RAC beams than that of NAC beams. This proves the effectiveness of using different shear strengthening configurations and the viability of using CFRP shear strengthened RAC beams compared to CFRP shear strengthened NAC beams.</p></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2452321624001252/pdf?md5=7c11239cd8a34e35a13ef346ab64cebc&pid=1-s2.0-S2452321624001252-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Procedia Structural Integrity","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2452321624001252","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

This study aims at investigating the effect of strengthening shear-deficient recycled aggregate concrete (RAC) beams with carbon fiber-reinforced polymer (CFRP) laminates. Five RAC beams were cast, four of which were strengthened with different CFRP shear strengthening configurations: U-wraps bonded at 45°, vertical U-wraps, continuous U-wraps along the shear span, and side-boned laminates. In addition, one RAC specimen was left unstrengthened to act as a benchmark specimen. For comparison purposes, an additional five normal aggregate concrete (NAC) beams were cast, three of which are strengthened with similar CFRP schemes as that of the RAC, and one was left unstrengthened. All beams are loaded under four-point bending tests, and the results in terms of shear force-deflection graphs and failure modes are analyzed and compared. Experimental results indicated that the shear force values obtained in NAC and RAC beams are comparable. In fact, the percentage increase in the shear strength compared to the respective control beam was higher for RAC beams than that of NAC beams. This proves the effectiveness of using different shear strengthening configurations and the viability of using CFRP shear strengthened RAC beams compared to CFRP shear strengthened NAC beams.

用不同类型的外部粘结抗剪钢筋加固的普通和再生骨料梁的性能
本研究旨在探讨用碳纤维增强聚合物(CFRP)层压板加固剪力不足的再生骨料混凝土(RAC)梁的效果。共浇筑了五根 RAC 梁,其中四根采用不同的 CFRP 剪力加固配置进行加固:其中四种采用了不同的 CFRP 剪力加固配置:45° 粘接的 U 型缠绕层、垂直 U 型缠绕层、沿剪力跨度的连续 U 型缠绕层以及侧骨层压板。此外,还有一个 RAC 试样未进行加固,作为基准试样。为便于比较,还浇铸了另外五根普通骨料混凝土(NAC)梁,其中三根采用了与 RAC 类似的 CFRP 加固方案,一根未加固。所有梁均在四点弯曲试验下加载,并对剪力-挠度图和破坏模式的结果进行了分析和比较。实验结果表明,NAC 和 RAC 梁获得的剪力值相当。事实上,与各自的对照梁相比,RAC 梁的剪切强度增加百分比高于 NAC 梁。这证明了使用不同剪力加固配置的有效性,以及与 CFRP 剪力加固 NAC 梁相比,使用 CFRP 剪力加固 RAC 梁的可行性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
CiteScore
1.70
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信