Structural Behavior of Concrete Columns Reinforced with BFRP Bars: Experimental Study and Predictive Models

IF 1.7 4区 工程技术 Q3 ENGINEERING, CIVIL
Fkrat Latif Hamid, Ali Ramadhan Yousif
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Abstract

In recent years, research has explored using glass fiber-reinforced polymer (GFRP) bars as a corrosion-resistant alternative to steel reinforcement in concrete columns. Design guidelines have been established in ACI 440.11–22 for GFRP bars. However, there's currently no specific code for Basalt fiber-reinforced polymer (BFRP) bars in concrete columns due to limited experimental data. This study investigates using BFRP bars and ties as an alternative to steel reinforcement in concrete columns. It presents results from testing 11 columns under concentric loads. The test variables included the longitudinal BFRP reinforcement ratio, BFRP tie spacings, BFRP tie diameter, and reinforcement type. The experimental results showed a resemblance in the performance of concrete columns reinforced with BFRP and steel bars. Longitudinal BFRP bars contributed between 6.4 and 17.2% to the ultimate load-carrying capacity. A reduction in tie spacing was observed to slightly improve the load-carrying capacity. Moreover, when using the same volumetric reinforcement ratio, employing smaller diameter bars with closer spacings proved to be more efficient than using larger diameter bars with greater spacings. The study also introduced two models for predicting the maximum load capacity of BFRP-reinforced concrete columns, and the proposed models showed high accuracy compared to existing models in the literature.

Abstract Image

用 BFRP 杆件加固的混凝土柱的结构行为:实验研究与预测模型
近年来,研究人员一直在探索使用玻璃纤维增强聚合物(GFRP)钢筋来替代混凝土柱中的钢筋。ACI 440.11-22 已为 GFRP 钢筋制定了设计准则。然而,由于实验数据有限,目前还没有针对混凝土柱中玄武岩纤维增强聚合物(BFRP)钢筋的具体规范。本研究探讨了在混凝土柱中使用 BFRP 钢筋和拉杆作为钢筋的替代品。研究介绍了在同心荷载下对 11 根支柱进行测试的结果。测试变量包括纵向 BFRP 配筋率、BFRP 拉杆间距、BFRP 拉杆直径和配筋类型。实验结果表明,使用 BFRP 和钢筋加固的混凝土柱性能相似。纵向 BFRP 钢筋对极限承载能力的贡献率为 6.4% 至 17.2%。据观察,减少拉杆间距可略微提高承载能力。此外,在使用相同体积配筋率的情况下,使用直径较小、间距较近的钢筋比使用直径较大、间距较大的钢筋更有效。研究还引入了两个模型来预测 BFRP 加固混凝土柱的最大承载能力,与文献中的现有模型相比,所提出的模型显示出较高的准确性。
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来源期刊
CiteScore
3.30
自引率
11.80%
发文量
203
期刊介绍: The aim of the Iranian Journal of Science and Technology is to foster the growth of scientific research among Iranian engineers and scientists and to provide a medium by means of which the fruits of these researches may be brought to the attention of the world’s civil Engineering communities. This transaction focuses on all aspects of Civil Engineering and will accept the original research contributions (previously unpublished) from all areas of established engineering disciplines. The papers may be theoretical, experimental or both. The journal publishes original papers within the broad field of civil engineering which include, but are not limited to, the following: -Structural engineering- Earthquake engineering- Concrete engineering- Construction management- Steel structures- Engineering mechanics- Water resources engineering- Hydraulic engineering- Hydraulic structures- Environmental engineering- Soil mechanics- Foundation engineering- Geotechnical engineering- Transportation engineering- Surveying and geomatics.
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