Shear Behavior of Reactive Powder Concrete Ferrocement Beams with Light Weight Core Material

IF 3.6 3区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Mohamed H. Makhlouf, M. Alaa, Gamal I. Khaleel, K. M. Elsayed, M. H. Mansour
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Abstract

In this paper, the shear behavior of ferro-cement hollow beams is investigated experimentally and analytically. Ten reinforced concrete beams with cross-sectional dimensions of 100 × 200 × 1300 mm and a clear span of 1000 mm were cast and tested until failure under a two-point loading system. Ferrocement beams in this research contained either an autoclaved aerated lightweight brick core (AAC) or an extruded foam core (EFC) and were reinforced with either expanded metal mesh (EMM) or welded wire mesh (WWM). The structural behavior of the studied beams, including first crack, deflection, ultimate load, crack pattern, failure mode, and ductility index, was investigated. The experimental data were used to validate finite element models created with the ABAQUS finite element program. It can be concluded that the optimum performance of ferrocement beams can be achieved using beams with a second layer of expanded steel mesh as additional reinforcement, which led to an increase in the ultimate load and maximum deflection by 12.9% and 22.8%, respectively. Furthermore, the Numerical results agreed with the experimental results, where the ratio between the NLFE ultimate loads and the experimental ultimate loads varies between 1.02 and 1.07, with an average ratio of 1.04.

Abstract Image

含轻质芯材的反应粉末混凝土铁水泥梁的剪切行为
本文通过实验和分析研究了铁水泥空心梁的剪切行为。在两点加载系统下,对横截面尺寸为 100 × 200 × 1300 毫米、净跨度为 1000 毫米的十根钢筋混凝土梁进行了浇注和测试,直至破坏。研究中的铁水泥梁包含蒸压加气轻质砖芯(AAC)或挤压泡沫芯(EFC),并用膨胀金属网(EMM)或焊接金属网(WWM)进行加固。研究人员调查了所研究梁的结构行为,包括首次开裂、挠度、极限荷载、开裂模式、破坏模式和延性指数。实验数据用于验证使用 ABAQUS 有限元程序创建的有限元模型。可以得出的结论是,使用第二层膨胀钢网作为额外加固的梁可以实现铁水泥梁的最佳性能,其极限荷载和最大挠度分别增加了 12.9% 和 22.8%。此外,数值结果与实验结果一致,NLFE 极限荷载与实验极限荷载的比值介于 1.02 与 1.07 之间,平均比值为 1.04。
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
International Journal of Concrete Structures and Materials
International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
6.30
自引率
5.90%
发文量
61
审稿时长
13 weeks
期刊介绍: The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.
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