Effect of Fire on Reinforced Concrete Beams with FRP and Conventional Steel at Limited Time of Fire

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-05-12 DOI:10.2478/cee-2023-0006

Mohamed Atef Ghobashy, A. Hilal, M. Ibrahim

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Abstract

Abstract The aim of this study is to investigate the behavior of RC concrete beams reinforced with basalt, carbon, glass fiber reinforced polymer bars and conventional steel. A comparison between the results has been performed to investigate and study the effect of fire on reinforced concrete beams considering the following items: (flexural capacity, deflection behavior and crack pattern). It is noticeable that the use of FRP bars significantly increased the ultimate load of the specimens, where the percentage of increase ranged between 34 - 73 % of the ultimate load of the specimen C-S under static load. The greatest ultimate load was reached the beam that was reinforced with carbon bars (CFRP). It was also noticed able that the use of FRP rods significantly increases the deflection of the beams. The percentage of increase was between 45 - 170 % of the final deflection of the C-S specimen under static load. It was noted that the effect of the fire on the beams reinforced with fiber bars (FRP), where the efficiency of bearing capacity of beams after fire decreases by 11 to 18 % of the actual efficiency of bearing capacity of beams control. As for the beam reinforced with conventional steel bars, its efficiency was reduced by 15 % from the actual capacity.

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火灾对有限火灾时间内FRP与常规钢结构钢筋混凝土梁的影响

摘要本研究的目的是研究玄武岩、碳纤维、玻璃纤维增强聚合物钢筋和普通钢加固的钢筋混凝土梁的性能。为了研究火灾对钢筋混凝土梁的影响，对以下项目进行了比较：（抗弯承载力、挠度行为和裂缝模式）。值得注意的是，FRP筋的使用显著增加了试件的极限载荷，在静载荷下，增加的百分比在试件C-S极限载荷的34-73%之间。碳纤维布加固梁的极限荷载最大。还注意到，FRP杆的使用显著增加了梁的挠度。增加的百分比在静态载荷下C-S试样最终挠度的45-170%之间。值得注意的是，火灾对纤维筋加固梁的影响，火灾后梁的承载力效率降低了梁实际承载力控制效率的11%至18%。对于传统钢筋加固的梁，其效率比实际承载力降低了15%。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.