Study on anchorage performance deterioration of carbon fiber bundle anchor under seawater wet-dry cycles

doi:10.19936/j.cnki.2096-8000.20260928.004

Abstract

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

CLC Number:

TB332

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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