Sustainable shear strengthening of defected RC beams using aluminum boxes and high-performance concretes

IF 6 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Ain Shams Engineering Journal Pub Date : 2025-03-20 DOI:10.1016/j.asej.2025.103354

Mohamed Ghalla , Alireza Bahrami , Moataz Badawi , Galal Elsamak , Mohamed Emara , Ali Mohamed Abdallah

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引用次数: 0

Abstract

In the quest for sustainable and resilient structures, the enhancement of reinforced concrete (RC) beams has emerged as a critical area of research. Traditional strategies of shear strengthening often involve materials and techniques that are neither environmentally friendly nor cost-effective. This investigation aimed to improve shear resistance of RC beams exhibiting pre-existing shear deficiencies, strengthened using aluminum boxes containing high-performance concretes (HPCs). The experimental program involved testing eleven RC beams under three-point bending, with different parameters such as number of boxes, type of filling concrete, and existence of reinforcement within the aluminum boxes. The outcomes revealed that employing aluminum boxes considerably augmented the shear resistance of such beams, preventing brittle shear collapse and enhancing load-bearing capacity, stiffness, ductility, and energy absorption. Among tested HPCs, ultra-high-performance concrete (UHPC) demonstrated superior resistance compared to other types, especially when combined with steel or glass fiber reinforced polymer bars. Utilizing UHPC led to a significant improvement in the beam performance: stiffness and ultimate load increased by up to 99 % and 28 %, respectively, while achieving a more desired flexural failure mode. Also, the study proposed a formula to predict the shear capacity of beams enhanced with the proposed technique. The effectiveness of this formula as a useful tool for design and analysis was confirmed by its strong agreement with the experimental and finite element results.

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来源期刊

Ain Shams Engineering Journal Engineering-General Engineering

CiteScore

10.80

自引率

13.30%

发文量

441

审稿时长

49 weeks

期刊介绍： in Shams Engineering Journal is an international journal devoted to publication of peer reviewed original high-quality research papers and review papers in both traditional topics and those of emerging science and technology. Areas of both theoretical and fundamental interest as well as those concerning industrial applications, emerging instrumental techniques and those which have some practical application to an aspect of human endeavor, such as the preservation of the environment, health, waste disposal are welcome. The overall focus is on original and rigorous scientific research results which have generic significance. Ain Shams Engineering Journal focuses upon aspects of mechanical engineering, electrical engineering, civil engineering, chemical engineering, petroleum engineering, environmental engineering, architectural and urban planning engineering. Papers in which knowledge from other disciplines is integrated with engineering are especially welcome like nanotechnology, material sciences, and computational methods as well as applied basic sciences: engineering mathematics, physics and chemistry.