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Design approach for FRP spike anchors in FRP-strengthened RC structures

机译：FRP加固RC结构中FRP钉锚的设计方法

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摘要

The strength and deformability of reinforced concrete (RC) structures strengthened with externally bonded fibre-reinforced polymer (FRP) composites can be enhanced with the addition of anchorage devices. The inclusion of anchorage can also result in a higher utilization of the desirable strength properties of the FRP by mitigating debonding. FRP spike anchors are a particularly effective type of anchorage devices as they can be applied to a wide variety of structural forms that have been strengthened with FRP composites. Experimental verification has supported the effectiveness of such anchors. However, the limited availability of design guidance is inhibiting the widespread application of anchors in practice. A critical review of the design models available in the literature is presented in addition to a design methodology for the incorporation of FRP spike anchors in RC structures strengthened with FRP composites. Exemplar designs of FRP spike anchors are also presented, to be used in combination with the design examples currently included in ACI 440.2R (2017). Finally, several knowledge gaps are identified which can be used to inform future studies.
机译：外部锚固的纤维增强聚合物（FRP）复合材料增强的钢筋混凝土（RC）结构的强度和可变形性可以通过添加锚固装置来增强。通过减轻剥离作用，包含锚固也可以导致FRP所需强度特性的更高利用率。 FRP钉锚是一种特别有效的锚固装置，因为它们可以应用于已由FRP复合材料增强的多种结构形式。实验验证支持了这种锚的有效性。然而，设计指导的有限可用性阻碍了锚在实践中的广泛应用。除了在玻璃钢复合材料加固的钢筋混凝土结构中加入玻璃钢钉锚的设计方法之外，还对文献中可用的设计模型进行了严格的审查。还介绍了FRP钉锚的示例设计，可与ACI 440.2R（2017）中当前包含的设计示例结合使用。最后，确定了一些知识空白，可用于为将来的研究提供信息。

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