内置玻璃纤维增强复合材料（GFRP）管-混凝土组合边节点抗震性能研究

白玉磊; 刘泽源; 邢雅森; 张霄; 孟宪磊; 张石岩

doi:10.3724/j.gyjzG25082902

内置玻璃纤维增强复合材料（GFRP）管-混凝土组合边节点抗震性能研究

doi: 10.3724/j.gyjzG25082902

1. 北京工业大学建筑工程学院, 北京 100124;
2. 北京建工集团有限责任公司, 北京 100055;
3. 深圳大学土木与交通工程学院, 广东深圳 518060

基金项目:

非金属材料创新中心创新基金资助（24SFP-2）。

详细信息

作者简介:
白玉磊，博士，教授，主要从事复合材料结构加固研究。

通讯作者:
张石岩，zsy18834823819@163.com。

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出版历程
- 收稿日期: 2025-08-29
- 刊出日期: 2025-10-31

Seismic Performance of Embedded GFRP Tube-Concrete Composite Exterior Beam-Column Joints

1. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;
2. Beijing Construction Engineering Group Co., Ltd., Beijing 100015, China;
3. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China

摘要

摘要: 针对传统混凝土（NC）节点核心区箍筋密集所导致施工拥堵、浇筑缺陷及强震下剪切脆性破坏问题，提出玻璃纤维增强聚合物（GFRP）管-混凝土组合节点形式，并与高延性混杂纤维水泥基复合材料（HECC）联用以替代核心区箍筋并改善界面黏结性能。共设计4个梁柱边节点，参数为核心区材料（NC、HECC）与GFRP管纤维角度（±45°/±60°）。通过循环加载试验，比较了节点的承载力、延性、能量耗散与刚度退化等。结果表明：GFRP管的约束作用显著提升了节点的延性，纤维角度为±45°的组合节点较纤维角度为±60°的组合节点在能量耗散方面提高9.3%；核心区采用GFRP管与HECC的组合节点，由于GFRP管提供侧向约束并分担斜向主拉/压应力，且HECC改善钢筋-基体黏结并抑制裂缝扩展，其延性和刚度保持与传统混凝土节点相当，承载力可提高1.3%，能量耗散提高8.8%。与传统混凝土节点相比，该组合节点可显著减少核心区箍筋用量，为少箍筋高性能节点的应用提供可行路径。
- GFRP管 /
- 高延性混杂纤维水泥基复合材料（HECC） /
- 梁柱边节点 /
- 抗震性能
Abstract: To address issues such as construction congestion， concrete casting defects， and shear-induced brittle failure in the core region of traditional concrete beam–column joints under severe earthquakes， this study proposes a novel joint system incorporating glass fiber-reinforced polymer （GFRP） tubes combined with high-ductility hybrid fiber-reinforced engineered cementitious composite （HECC）. This system is designed to replace stirrups in the joint core and improve interfacial bonding performance. Four exterior beam-column joint specimens were designed， with the core material （normal concrete （NC） or HECC） and GFRP tube fiber orientation （±45° or ±60°） as the main test variables. Quasi-static cyclic loading tests were conducted to evaluate and compare the seismic performance of the joints， including bearing capacity， ductility， energy dissipation， and stiffness degradation. The results demonstrated that the confinement provided by the GFRP tubes significantly enhanced joint ductility. Specimens with ±45° fiber-oriented tubes exhibited a 9.3% improvement in energy dissipation compared to those with ±60° tubes. Moreover， due to the lateral confinement provided by the GFRP tubes， which helps resist diagonal principal tensile/compressive stresses， and the improved reinforcement-to-matrix bond and crack propagation inhibition offered by the HECC， the joint combining GFRP tubes and HECC in the core region showed comparable ductility and stiffness retention to the conventional concrete joint， along with a 1.3% increase in bearing capacity and an 8.8% improvement in energy dissipation.Compared with traditional concrete joints， the proposed composite joint significantly reduces stirrup usage and construction difficulty， thus offering a viable solution for designing high-performance beam-column joints with minimal transverse reinforcement.
- GFRP tubes /
- high-ductility hybrid fiber reinforced ECC（HECC） /
- beam-column exterior joints /
- seismic performance

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