不同端部锚固FRP-砌体界面黏结性能试验研究

doi:10.19936/j.cnki.2096-8000.20220628.005

摘要/Abstract

摘要： 适当的端部锚固措施可以有效提高FRP与砌体之间的界面黏结力,延缓或阻止端部发生过早剥离破坏。为明确端部锚固对界面黏结性能的影响,在总结现有的端部锚固措施方法的基础上,设计制作了4种不同端部锚固GFRP-砌体试件,通过单面剪切拉伸试验,重点分析了试件的破坏现象、荷载-滑移与应变分布特性,讨论了锚固的工作机理和适用性。结果表明:所有锚固形式的GFRP加固试件失效模式均为界面脱黏;采用碳纤维扇头钉锚固、胶-机械混合锚固、树脂胶钉锚固和双向碳纤维补丁锚固的GFRP加固试件相比未锚固的加固试件,其极限承载力分别提高了约85.69%、88.34%、68.82%和50.09%;锚固在一定程度上限制脱黏滑移,双向碳纤维补丁锚固的效果最为显著,降低了44.58%。试验结果可对实际工程中选择最佳锚固方法提供参考。

关键词: 玻璃纤维布, 砌体结构, 端部锚固, 试验研究, 复合材料

Abstract: The application of appropriate end anchorage measures can effectively improve the bonding force of the interface between FRP and masonry, and delay or prevent the premature end stripping failure. In order to clarify the effect of end anchorage on bond performance, a series of single shear tests of GFRP-masonry bond joint with fourkinds of end anchorage were designed and manufactured on the basis of summarizing existing end anchorage measures and methods. The failure and load-slip and strain distribution characteristics of the specimens were analyzed by single shear and tensile tests, and the working mechanism and applicability of anchorage were discussed. The experimental results show that the failure mode of FRP to masonry interface was interfacial debonding for all specimens. The ultimate bearing capacity of Carbon Spike Anchor (CSA), Adhesive-Mechanical Hybrid Anchor (AMHA), New Epoxy Anchor (NEA) and Bidirectional Carbon Patch Anchor (BCPA) specimens increased by 85.69%, 88.34%, 68.82% and 50.09%, respectively, compared with the Reference (REF) specimens. The debonding slip of BCPA specimens has the most significant limitation, which reduces by 44.58%. The test results can also provide reference for choosing the best anchorage method in practical engineering.

Key words: glass fiber fabric, masonry structure, end anchorage, experimental investigation, composites

中图分类号:

TB332

唐永明, 郭晓云, 陈杰. 不同端部锚固FRP-砌体界面黏结性能试验研究[J]. 复合材料科学与工程, 2022, 0(6): 33-40.

TANG Yong-ming, GUO Xiao-yun, CHEN Jie. Experimental study on bonding capacity of FRP-masonry interface with various end anchorages[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(6): 33-40.

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