Flexural strengthening of concrete beams using prefabricated mortar laminates reinforced with GFRP bars and hybrid fibers

Q2 Engineering

Asian Journal of Civil Engineering Pub Date : 2025-04-14 DOI:10.1007/s42107-025-01330-x

Reza Khaleghi, Mehrzad TahamouliRoudsari

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引用次数: 0

Abstract

In this study, the flexural behavior of reinforced concrete beams strengthened with prefabricated mortar laminates reinforced with high-performance fiber-reinforced cementitious composite (PML-HPFRCC) was examined both numerically and experimentally. In addition to conducting bending tests on reinforced concrete beams, the performance of prefabricated mortar laminates was examined under both static and cyclic loading conditions. Three reinforced concrete beams were analyzed, including one reference beam and two reinforced with polymer fiber-reinforced prefabricated mortar laminates, featuring volume percentages of micro steel and polyvinyl alcohol contents of 1.8% and 0.5%, respectively. Numerical studies were conducted to evaluate the effects of the height of the strengthening plate and the percentage of reinforcement bars. The results from four-point bending tests demonstrated that the load-bearing capacity of beams reinforced with three and four polymer bars increased by 189% and 284%, respectively. Additionally, elastic stiffness increased by 28% and 92%, while energy absorption capacity decreased by 43% and 2.6%.

查看原文本刊更多论文

用GFRP筋和混合纤维加固预制砂浆层合板对混凝土梁进行抗弯加固

在本研究中，采用高性能纤维增强胶凝复合材料（PML-HPFRCC）预制砂浆层合板加固钢筋混凝土梁的受弯性能进行了数值和实验研究。除了对钢筋混凝土梁进行弯曲试验外，还对预制砂浆层合板在静荷载和循环荷载条件下的性能进行了测试。对3根钢筋混凝土梁进行了分析，其中1根为参考梁，2根为聚合物纤维增强预制砂浆层合板，微钢体积百分比为1.8%，聚乙烯醇含量为0.5%。通过数值研究来评价加固板高度和配筋比例对加固效果的影响。四点弯曲试验结果表明，三根和四根聚合物筋加固梁的承载力分别提高了189%和284%。此外，弹性刚度提高了28%和92%，而能量吸收能力下降了43%和2.6%。

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来源期刊

Asian Journal of Civil Engineering Engineering-Civil and Structural Engineering

CiteScore

2.70

自引率

0.00%

发文量

121

期刊介绍： The Asian Journal of Civil Engineering (Building and Housing) welcomes articles and research contributions on topics such as:- Structural analysis and design - Earthquake and structural engineering - New building materials and concrete technology - Sustainable building and energy conservation - Housing and planning - Construction management - Optimal design of structuresPlease note that the journal will not accept papers in the area of hydraulic or geotechnical engineering, traffic/transportation or road making engineering, and on materials relevant to non-structural buildings, e.g. materials for road making and asphalt. Although the journal will publish authoritative papers on theoretical and experimental research works and advanced applications, it may also feature, when appropriate: a) tutorial survey type papers reviewing some fields of civil engineering; b) short communications and research notes; c) book reviews and conference announcements.