长沙理工大学学报（自然科学版）2025，Vol.22Issue(5)：78-88,11.DOI:10.19951/j.cnki.1672-9331.20240506001
端头腐蚀下吊索热铸锚黏结性能退化试验研究
Experimental study on bond performance degradation of suspender hot-cast anchor under corrosion of anchorage end
摘要
Abstract
[Purposes]This paper aims to reveal the corrosion mechanism and damage evolution law of hot-cast anchorage end under the service environment and to clarify the influence of structural parameters and corrosion time on the interfacial bond performance of steel wire/hot-cast alloy.[Methods]An electrified accelerated corrosion test for the monofilament anchorage specimen was conducted.The corrosion morphology of the specimen end surface and the distribution characteristics of the corrosion depth at the bond interface were studied by combining the three-dimension laser scanning method.Based on the pull-out test,the load-displacement curves,failure modes,and bond strength distribution law were studied.The effects of anchorage length,anchorage angle,wire diameter,and electro-erosion time on the bond performance were analyzed.A formula for calculating the ultimate pull-out load of anchorage specimens was obtained using the multiple linear regression method.[Findings]The corrosion depth of the alloy end surface increases when the site is close to the bond interface,and the corrosion depth at the bond interface follows a normal distribution.The mean and standard deviation of the corrosion depth gradually increase with the increase in electro-erosion time.Increasing the anchorage length,anchorage angle,and wire diameter will increase the bond strength of the specimens.As the electro-erosion time increases,the bond strength of the specimen significantly decreases,with a maximum decrease of 24.98％.The calculated ultimate pull-out load results are in good agreement with the experimental results.[Conclusions]After long-term corrosion of the hot-cast anchorage end,the interfacial bond performance decreases rapidly,and the load-bearing capacity of the hot-cast anchor decreases significantly.The research results can provide theoretical support for the structural parameters and anticorrosive design of the suspender hot-cast anchor.关键词
桥梁吊索/热铸锚具/性能退化/三维激光扫描/概率特征Key words
bridge suspender/hot-cast anchor/performance degradation/three-dimension laser scanning/probabilistic characteristic分类
交通运输引用本文复制引用
周昊,马亚飞..端头腐蚀下吊索热铸锚黏结性能退化试验研究[J].长沙理工大学学报（自然科学版）,2025,22(5):78-88,11.基金项目
国家自然科学基金项目(52178107) （52178107）
湖南省杰出青年科学基金项目(2024JJ2003) Project(52178107)supported by National Natural Science Foundation of China （2024JJ2003）
Project(2024JJ2003)supported by Natural Science Foundation for Distinguished Young Scholars of Hunan Province （2024JJ2003）
