海水干湿循环下碳纤维束锚锚固性能劣化试验研究

doi:10.19936/j.cnki.2096-8000.20260928.004

摘要/Abstract

摘要： 为探究海水侵蚀环境下碳纤维复合材料(Carbon Fiber Reinforced Plastics, CFRP)束锚的锚固性能劣化规律,进行了海水干湿循环作用下纤维束锚扇-CFRP片材黏结结点的拉伸剪切试验以及纤维束锚杆-混凝土黏结结点的拉拔试验。总结了试件的破坏形态、极限荷载和极限位移随干湿循环周期的变化情况,并且分析了树脂材料中添加短切碳纤维对黏结性能的影响。试验结果表明:随着干湿循环周期的增加,锚扇-CFRP布试件的破坏形式由搭接界面的部分剥离逐渐向完全剥离破坏转变,极限荷载在240次干湿循环后提高了17.6%,但锚扇-CFRP板试件极限荷载降低了42.79%。锚扇-CFRP试件的极限位移前期先上升,后期则降低40%~50%。锚杆-混凝土试件的极限荷载在各干湿循环周期后均有提高,在循环180 d时提高了25.16%;其破坏形态由锥形混凝土拔出破坏逐步转变为锚杆完全拔出破坏。添加短切碳纤维的试件界面黏结性能提升不明显。

关键词: 碳纤维复合材料, 纤维束锚扇, 纤维束锚杆, 干湿循环, 劣化规律

Abstract: To investigate the degradation behavior of the anchorage performance of carbon fiber reinforced plastics (CFRP) under seawater erosion, tensile shear tests of the bond joints between anchor fan and CFRP sheets, as well as pull-out tests of the bond joints between anchor bolt and concrete, were conducted under seawater wet-dry cycles. The failure modes, ultimate loads, and ultimate displacements of the specimens were summarized with the variation of wet-dry cycles, and the influence of adding short-cut carbon fibers to the resin material on the bond performance was analyzed. The test results showed that with the increase of wet-dry cycles, the failure mode of the anchor fan-CFRP sheet specimens gradually shifted from partial delamination to complete delamination on the bond interface. The ultimate load of the anchor fan-CFRP sheet specimens increased by 17.6% after 240 wet-dry cycles, while the ultimate load of the anchor fan-CFRP plate specimens decreased by 42.79%. The ultimate displacement of the anchor fan-CFRP specimens initially increased and then decreased by 40% to 50%. The ultimate load of the anchor bolt-CFRP specimens increased after each wet-dry cycle, with an increase of 25.16% after 180 cycles. The failure mode of the anchor bolt-CFRP specimens gradually changed from conical concrete breakout to complete pull-out of anchor bolt. The bond performance of the specimens with additional short-cut carbon fibers was not significantly improved.

Key words: CFRP, anchor fan, anchor bolt, seawater wet-dry cycles, the degradation behavior

中图分类号:

TB332

董坤, 庞之贤, 刘辉, 高钰. 海水干湿循环下碳纤维束锚锚固性能劣化试验研究[J]. 复合材料科学与工程, 2026, 0(9): 30-37.

DONG Kun, PANG Zhixian, LIU Hui, GAO Yu. Study on anchorage performance deterioration of carbon fiber bundle anchor under seawater wet-dry cycles[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(9): 30-37.

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