An adhesive-bolt hybrid joint and its application in concrete beam reinforced with FRP bars

IF 4.3 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2025-04-19 DOI:10.1016/j.istruc.2025.108967

Hao Zhou , Chenyang Wu , Wei Guo , Jiaxing Li , Huixia Wang

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引用次数: 0

Abstract

This study introduces an adhesive-bolt hybrid joint designed to address the challenges of connecting Fiber Reinforced Polymer (FRP) bars in concrete applications. To optimize the mechanical performance of FRP bars while addressing issues such as uneven stiffness distribution and compliance with concrete cover thickness requirements, the joint integrates the clamping force of bolts, the adhesive bonding force and the restraint provided by a sleeve. The research provides a comprehensive methodology for force analysis and joint design, focusing on minimizing anchorage length and enhancing load transfer mechanisms. The proposed joint design was validated through mechanical performance tests on both the hybrid joint and FRP reinforced concrete beams incorporating the joint. Results show that the adhesive-bolt hybrid joint meets the design criteria for FRP bar connections, effectively utilizing the superior tensile properties of FRP bars to improve the load-bearing capacity and deformation performance of FRP reinforced concrete beams. The application of this hybrid joint in FRP reinforced concrete beams illustrates its potential to enhance structural safety and performance, with observed crack widths and overall mechanical performance comparable to those of FRP reinforced concrete structures without the joint.

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粘结-锚杆复合节点及其在FRP筋混凝土梁中的应用

本研究介绍了一种粘合剂-螺栓混合接头，旨在解决混凝土应用中连接纤维增强聚合物（FRP）钢筋的挑战。为了优化FRP筋的力学性能，同时解决诸如刚度分布不均匀和符合混凝土覆盖厚度要求等问题，该接头集成了螺栓的夹紧力、胶粘力和套筒提供的约束。该研究为力分析和节点设计提供了全面的方法，重点是最小化锚固长度和增强荷载传递机制。提出的节点设计通过混合节点和包含该节点的FRP钢筋混凝土梁的力学性能测试进行了验证。结果表明：粘结-锚杆复合连接符合FRP筋连接设计标准，有效利用FRP筋优越的抗拉性能，提高FRP筋混凝土梁的承载能力和变形性能。这种混合接缝在FRP筋混凝土梁中的应用表明，它具有提高结构安全性和性能的潜力，观察到的裂缝宽度和整体力学性能与没有接缝的FRP筋混凝土结构相当。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.