建筑结构学报2024，Vol.45Issue(4)：237-246,10.DOI:10.14006/j.jzjgxb.2022.0878
海水与腐蚀电流耦合作用下铝合金与混凝土界面黏结性能
Interfacial adhesion between aluminum alloy and reinforced concrete under coupling effect of chloride ion and corrosion current
摘要
Abstract
In order to improve the durability and serviceability of marine concrete structures,a composite structure of aluminum alloy plate reinforced concrete integrating corrosion protection was proposed,based on the sacrificial anode cathodic protection technology.The interface bonding performance of the composite structure was studied,and a calculation method of interface bonding strength under the coupling action of seawater and corrosion current was established.15 sets(a total of 45)of aluminum alloy plate concrete interface shear specimens under indoor environment and coupling environment(seawater and corrosion current)with accelerated corrosion,were designed and single shear tests were carried out.The influences of parameters such as bond length(60 mm,80 mm and 100 mm),bond width(60 mm,80 mm and 100 mm),groove depth(1.5 mm and 2.5 mm)on the surface of aluminum alloy plate,as well as corrosion time(30 days,60 days and 90 days),on the failure mode,extreme load and strain distribution in specimen interface were explored.The results show that interface peeling between bonding layer and concrete is the failure mode under indoor curing,while interface peeling between aluminum alloy plate and bonding layer is the failure mode under coupling environment.As the corrosion time reaches 90 days,the peeling area of concrete decreases obviously,which indicates that the coupling action of seawater and corrosion current can reduce the interface bonding performance of the aluminum alloy plate and bonding layer.The increases of bonding length,width and surface groove depth can enhance the ultimate failure load of the specimen interface under indoor environments,and also alleviate the adverse impact of coupling environment on the bonding performance of the specimen.However,when the bonding length or width exceeds 80 mm,the above relieving effect is weakened.Using the ultimate load obtained from the experiment,the environmental impact coefficient,groove depth coefficient,and coefficients related to the bonding size of specimen were fitted.The Niedermeier bonding strength model was modified,which can be used to predict the bonding strength of aluminum alloy plate concrete interface under the coupling action of seawater and corrosion current.关键词
铝合金板与混凝土界面/海水和腐蚀电流耦合作用/单剪试验/界面破坏/黏结强度Key words
aluminum alloy plate-concrete interface/coupling action of seawater and corrosion current/single shear test/interface failure/bond strength分类
建筑与水利引用本文复制引用
温小栋,王俊豪,殷光吉,邵璟璟,冯蕾..海水与腐蚀电流耦合作用下铝合金与混凝土界面黏结性能[J].建筑结构学报,2024,45(4):237-246,10.基金项目
国家自然科学基金项目(51569035,52308262),宁波市科技创新2025重大专项(2020Z056),宁波市自然科学基金项目(2023J176). （51569035,52308262）
