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首页> 外文期刊>Composite Structures >Shear behavior of RC T-beams externally strengthened with anchored high modulus carbon fiber-reinforced polymer (CFRP) laminates
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Shear behavior of RC T-beams externally strengthened with anchored high modulus carbon fiber-reinforced polymer (CFRP) laminates

机译：锚固高模量碳纤维增强聚合物（CFRP）层压材料外部加强RC T梁的剪切行为

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摘要

This work presents the results of an experimental study on the effect of shear strengthening of reinforced concrete (RC) T-beams with high modulus carbon fiber-reinforced polymer (CFRP) laminates and anchors. The parameters considered were the anchor insertion angle and dowel diameter. Experimental results showed that the addition of U-wraps led to a 61% increase in shear strength compared to the control specimen, but failure was dominated by the brittle debonding of the CFRP laminates, with no ductility exhibited prior to failure. Anchoring the CFRP laminates with CFRP spike anchors further enhanced the shear capacity of the Uwrapped specimen by 14-51% and improved the shear contribution of the FRP by 36-136%, respectively. In addition, the CFRP anchorage system highly utilized the strain in the CFRP laminates and substantially enhanced the ductility of the specimens. A comparison between the shear resistance provided by the FRP reinforcement of the tested specimens and predicted capacity using current design guidelines showed that the current provisions could be safely applied to design RC T-beams strengthened in shear with anchored CFRP Uwraps.
机译：该工作介绍了钢筋混凝土（RC）T梁与高模量碳纤维增强聚合物（CFRP）层压板和锚固件剪切强化剪切强化效果的实验研究结果。所考虑的参数是锚固插入角和销钉直径。实验结果表明，与对照样品相比，加入U形包装导致剪切强度增加61％，但失效由CFRP层压板的脆性脱粘来支配，在失效之前没有表现出延展性。将CFRP层压板锚固与CFRP峰值锚固件进一步增强了UBRAPPET标本的剪切容量14-51％，并分别改善了FRP的剪切贡献36-136％。此外，CFRP锚固系统高度利用CFRP层压板中的应变，并大大提高了标本的延展性。使用当前设计指南的测试样品FRP加固和预测能力提供的剪切电阻的比较表明，可以安全地应用当前的规定，以设计锚固CFRP UWRAPS在剪切中加强的RC T梁。

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