Flexural performance of the negative moment region in bonded steel-wire-rope-strengthened reinforced concrete T-beams at different prestressing levels

IF 2.1 4区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Advances in Structural Engineering Pub Date : 2024-07-30 DOI:10.1177/13694332241268186
Yanuar Haryanto, Gathot Heri Sudibyo, Laurencius Nugroho, Hsuan-Teh Hu, Ay Lie Han, Fu-Pei Hsiao, Arnie Widyaningrum, Yudi Susetyo
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Abstract

This work examines the performance of reinforced concrete (RC) beams strengthened using bonded steel wire rope (SWR) at various prestressing levels. The strengthening approach has, however, been applied to the flexural strengthening of RC T-beams in the negative moment region, in order to determine its advantages. For this purpose, four RC T-beams were fabricated and tested under monotonic four-point bending: one control beam (S00), one beam strengthened with non-prestressed SWR (S20), and two beams strengthened with SWR (prestressed at 10% and 20% of their ultimate tensile strength: S21 and S22). The results indicate that the strengthened beams exhibit higher load-carrying capacities. Specifically, the cracking load, yield load, and ultimate load of S20, S21, and S22 increase by 10%–30%, 30%–50%, and 50%–90%, respectively, compared to S00. Additionally, there is an improvement in stiffness and energy absorption capacity. However, these strategies may have a dual effect on the specimens, resulting in a reduction in their ductility index. Finally, the tested beams were replicated using a three-dimensional finite element model, which has proved effective in predicting the behavior of such structures and, therefore, was found to be appropriate for use in future studies.
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不同预应力水平下粘结钢丝绳加固钢筋混凝土 T 梁负弯矩区的挠曲性能
这项研究探讨了在不同预应力水平下使用有粘结钢丝绳(SWR)加固钢筋混凝土(RC)梁的性能。不过,该加固方法已被应用于负弯矩区域的 RC T 型梁抗弯加固,以确定其优势。为此,我们制作了四根 RC T 型梁,并在单调四点弯曲下进行了测试:一根对照梁(S00)、一根使用非预应力 SWR 加固的梁(S20)和两根使用 SWR 加固的梁(预应力为极限抗拉强度的 10%和 20%:S21 和 S22)。结果表明,加固后的梁具有更高的承载能力。具体来说,与 S00 相比,S20、S21 和 S22 的开裂荷载、屈服荷载和极限荷载分别增加了 10%-30%、30%-50% 和 50%-90%。此外,刚度和能量吸收能力也有所提高。不过,这些策略可能会对试样产生双重影响,导致其延展性指数降低。最后,使用三维有限元模型对测试的横梁进行了复制,该模型已被证明能有效预测此类结构的行为,因此被认为适合在未来的研究中使用。
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来源期刊
Advances in Structural Engineering
Advances in Structural Engineering 工程技术-工程:土木
CiteScore
5.00
自引率
11.50%
发文量
230
审稿时长
2.3 months
期刊介绍: Advances in Structural Engineering was established in 1997 and has become one of the major peer-reviewed journals in the field of structural engineering. To better fulfil the mission of the journal, we have recently decided to launch two new features for the journal: (a) invited review papers providing an in-depth exposition of a topic of significant current interest; (b) short papers reporting truly new technologies in structural engineering.
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