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首页> 外文期刊>International Journal of Sustainable Materials and Structural Systems >Performance of NSM-FRP RC beams in flexure and shear using locally developed CFRP rebars
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Performance of NSM-FRP RC beams in flexure and shear using locally developed CFRP rebars

机译：使用本地开发的CFRP钢筋的NSM-FRP RC梁的弯曲和剪切性能

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摘要

In the present study, an experimental investigation was carried out to evaluate the flexural and shear capacity of near surface mounted (NSM) reinforced concrete (RC) beams using carbon fibre reinforced polymer (CFRP) rebars. A total of 16 half scale beams were tested to study the flexural and shear responses of strengthened RC beams. The CFRP rebars were manufactured at structural testing centre using locally developed twisting equipment to strengthen the RC beams. Also, new anchor system was locally developed to predict the tensile characteristics of CFRP bars using universal testing machine. To examine the flexural and shear behaviour, all beams were tested under two-point loading system. It was observed that the NSM strengthened RC beams have higher load carrying capacity than the corresponding control beam in flexure and shear by 68% and 35.6%, respectively. Typical failure modes of the beams during the experimental investigation were CFRP rupture, CFRP debonding, crushing of concrete and shear failure. Finally, a design example has been presented for better understanding in the analysis and design of NSM FRP strengthened RC beams. Further, the values obtained from the analytical study are in good agreement with the experimental values.
机译：在本研究中，进行了一项实验研究，以评估使用碳纤维增强聚合物（CFRP）钢筋的近表面安装（NSM）钢筋混凝土（RC）梁的弯曲和剪切能力。总共测试了16个半比例尺梁，以研究加强型RC梁的弯曲和剪切响应。 CFRP钢筋是在结构测试中心使用本地开发的加捻设备制造的，用于加固RC梁。此外，在当地开发了新的锚固系统，以使用通用测试机预测CFRP钢筋的拉伸特性。为了检查弯曲和剪切性能，所有梁都在两点加载系统下进行了测试。可以看出，NSM加固的RC梁的抗弯承载力和抗剪承载力分别比相应的控制梁高68％和35.6％。在实验研究中，梁的典型破坏模式为CFRP破裂，CFRP脱粘，混凝土破碎和剪切破坏。最后，给出了一个设计实例，以便在NSM FRP加固RC梁的分析和设计中更好地理解。此外，从分析研究中获得的值与实验值非常吻合。

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