Fatigue and monotonic strength of RC beams strengthened with CFRPs
Fatigue and monotonic strength of RC beams strengthened with CFRPs
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DOI：
10.1016/j.compositesa.2005.05.035
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发表时间：
2006-08
影响因子：
8.7
通讯作者：
C. Gheorghiu;P. Labossiére;J. Proulx
中科院分区：
文献类型：
--
作者：
C. Gheorghiu;P. Labossiére;J. Proulx
由于老化和交通负荷增加，交通基础设施整体恶化，促使研究人员寻找修复和监测现有结构的新方法。进行了大量研究并证明了将纤维增强聚合物 (FRP) 系统粘合到钢筋混凝土 (RC) 梁和柱等结构元件上的效率。尽管玻璃钢材料的使用潜力巨大，但其大规模实施往往因缺乏其在极端负载条件下的耐久性数据而受到阻碍。本文提出了一个实验项目，旨在评估碳纤维增强聚合物（CFRP）外部加固的 RC 梁的耐久性。小尺寸梁在疲劳载荷下进行不同次数的循环，然后在四点弯曲下进行单调测试直至失效。应变和应力曲线与测试期间获得的极限载荷和变形一起呈现。测试结果让我们深入了解 CFRP 加固梁在严酷疲劳载荷条件下的潜在长期性能。
The overall deterioration of transportation infrastructure due to ageing and increasing traffic loads has motivated researchers to look for new ways of repairing and monitoring existing structures. Numerous studies were conducted and proved the efficiency of bonding fibre-reinforced polymers (FRP) systems on structural elements such as reinforced concrete (RC) beams and columns. Although there is a huge potential for the use of FRP materials, their large-scale implementation is often impeded by the lack of data on their durability when submitted to extreme loading conditions. This paper presents an experimental project undertaken in order to assess the durability of RC beams externally strengthened with carbon-fibre-reinforced polymers (CFRPs). The small-scale beams were loaded in fatigue for various numbers of cycles and then tested monotonically under four-point bending up to failure. Strain and stress curves are presented together with the ultimate loads and deflections obtained during testing. The test results provide an insight on the potential long-term performance of CFRP-strengthened beams submitted to severe fatigue loading conditions.