A Novel Bond Anchor for Unidirectional FRP Member: Conceptual Design and Experimental Investigation
A Novel Bond Anchor for Unidirectional FRP Member: Conceptual Design and Experimental Investigation
复制标题
新型单向 FRP 构件粘结锚：概念设计和实验研究
DOI：
10.1155/2021/2666478
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发表时间：
2021-07
影响因子：
--
通讯作者：
Fu Bai-Yong
中科院分区：
文献类型：
--
作者：
Liu Yue;Wei Qing;Wang Ze-Yu;Xiang Peng;Du Long-Ji;Fu Bai-Yong
纤维增强聚合物(FRP)是一种先进的复合材料，具有重量轻、强度高、耐疲劳、耐腐蚀等优点，适用于拉索、预应力筋、拉杆等受拉构件。然而，单向玻璃钢是一种典型的各向同性材料，锚固难度大，不能充分发挥玻璃钢的优势。为了解决单向FRP构件的锚固问题，本文提出了一种新型的粘结锚固方法，即溶解-再粘结锚固。在这种新型的锚固系统中，单向玻璃钢构件两端的聚合物基质用溶剂溶解，锚固长度内的纤维直接由粘结剂粘合。理论分析表明，这种溶解-再粘结锚杆具有较高的锚固承载能力。通过静力拉伸试验验证了这种新型锚杆的设计，并与传统的粘结式锚杆进行了比较。结果表明，新型溶解-再粘结锚杆是可行的，其锚固效率明显高于传统粘结式锚杆。
Fiber-reinforced polymer (FRP) is an advanced composite material with many advantages including light weight, high strength, and high fatigue and corrosion resistance, which makes unidirectional FRP suitable for tension members, such as cables, prestressing tendons, and tie rods. However, the unidirectional FRP is a typical isotropic material, which is difficult to be anchored and hence unable to give full play to the advantages of FRP. To solve the anchoring problem of unidirectional FRP member, a novel bond anchor, i.e., dissolution-rebond anchor, is proposed in this paper. In this novel anchorage system, the polymer matrix of two ends of the unidirectional FRP member is dissolved by solvent and the fibers in the anchorage length are directly bonded by the binder. Theoretical analysis was performed to illustrate the high anchorage bearing capacity of this dissolution-rebond anchor. Static tensile test was conducted to verify this novel anchor design and compare with traditional bond anchor. Results show that the novel dissolution-rebond anchor is feasible and its anchorage efficiency is significantly higher than the traditional bond anchor.
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