2026-03-04 中国科学院（CAS）
＜関連情報＞
- https://english.cas.cn/newsroom/cas-in-media/202603/t20260304_1151434.shtml
- https://www.sciencedirect.com/science/article/abs/pii/S1359836826001691
CFRP補強風砂侵食コンクリートにおける界面接着性能の向上とそのメカニズム Enhancement and mechanisms of interfacial bonding performance in CFRP reinforced wind-sand eroded concrete
Kai Zhang, Qingyang Wu, Benli Liu, Yanhua Zhao, Yonghui Yu, Ruoxuan Yang
Composites Part B: Engineering,Available online 23 February 2026
DOI:https://doi.org/10.1016/j.compositesb.2026.113548
Abstract
Concrete structures in desert environments are subject to continuous wind-sand erosion, which accelerates their degradation. When reinforced with carbon fiber–reinforced polymer (CFRP), such structures often exhibit uneven surface damage caused by erosion. This study examines the changes of the interfacial bond between CFRP and wind-sand eroded concrete, considering the effects of erosion wind speed (EWS), erosion time (ET), and erosion angle of attack (EAA). Overall, sand erosion increased the interface ultimate bearing capacity of CFRP–concrete specimens by 31% and increased surface roughness tenfold compared with uneroded specimens. Increasing EWS increased surface roughness and improved CFRP–concrete bond strength, which reached a maximum at an EWS of 30 m/s. Under this condition, peak stress increased by 50.2% and the effective bond length by 21% relative to uneroded specimens. Beyond this optimum EWS, more severe concrete damage reduced interfacial performance, with peak stress decreasing by 4.7% from the maximum. When the EWS was 30 m/s and the EAA was 90°, bond strength increased with ET and reached a maximum at 8 min. Peak stress and effective bonded length increased by 28% and 15.9%, respectively. Further erosion caused substantial mortar loss and aggregate shedding, reducing peak stress by 4.7% and effective bond length by 2.9% from their optimal values. Increasing EAA from 30° to 120° progressively improved bond performance and transformed anchor pits from wedge-shaped to inverse-wedge-shaped, while maximum stress rose by 38.7% and effective bond length increased by 9.2%. Finally, predictive models were developed for interfacial bearing capacity and the bond–slip relationship that incorporate abrasion effects, which demonstrated good agreements with the experimental data. This study provides a theoretical basis for designing and assessing CFRP-concrete interfaces in desert environments.
