摘要
铝合金板具有轻质高强、延展性好、低温脆断敏感性小、耐腐蚀、易于成型等优点,可用于腐蚀及寒冷环境下的混凝土结构加固。该文基于双剪试验下的铝合金板-混凝土界面粘结滑移性能研究,完成了45个构件的双面纯剪试验,分析了混凝土强度等级、铝合金板表面粗糙度、铝合金板粘结长度和粘结宽度对粘结界面破坏机理、剥离承载力以及界面滑移的演化规律。研究表明:加载过程中界面应力从加载端向自由端逐步传递,且随着混凝土强度等级、铝合金板的粘结长度和宽度的增加,试件的剥离承载力也有所提高。但铝合金板的粘结长度存在一个有效粘结长度值,超过该值试件的剥离承载力将不会增加,同时铝合金板表面粗糙度对试件剥离承载力的提高没有实质影响。
Aluminum alloy has the advantages of light weight,high strength,good ductility,less sensitive to low temperature brittle fracture,corrosion resistance and easy forming,etc.It can be used for strengthening concrete structures under corrosion and cold environments.In this paper,referring to the study of bond-slip behavior of the interface between aluminum alloy and concrete under double shear test,the double shear tests of 45 members are carried out,and the bond interface failure mechanism is investigated,which is affected by concrete strength,surface roughness of aluminum alloy slab,bond length,bond width,peeling capacity and the load-slip curve of aluminum alloy plate.The results show that the interfacial stress is gradually transferred from the loading end to the free end during loading.With the increase of concrete strength and bonding length/width of aluminum alloy plate,the peeling capacity of the specimen also increases.However,there exists an effective bond length for aluminum alloy,and the peeling capacity of the specimen stops to increase if the bond length is larger than the effective value.The surface roughness of aluminum alloy has no substantial effect on the increase of the peeling capacity of the specimen.
作者
姜德文
黄海林
刘光伟
张明亮
JIANG De-wen;HUANG Hai-lin;LIU Guang-wei;ZHANG Ming-liang(College of Civil Engineering,Hu'nan University of Science and Technology,Xiangtan,Hu'nan 411201,China;Hu'nan Provincial Key Laboratory of Structures for Wind Resistance and Vibration Control,Hu'nan University of Science and Technology,Xiangtan,Hu'nan 411201,China;Hunan Construction Engineering Group Co.,Ltd.,Changsha,Hu'nan 410004,China)
出处
《工程力学》
EI
CSCD
北大核心
2020年第S01期287-295,共9页
Engineering Mechanics
基金
湖南省自然科学基金青年基金项目(2018JJ3161)
湖南省研究生科研创新项目(CX2018B666)
湖南建工集团基础研究项目(JGJTK-2018003)。
关键词
铝合金板
双剪试验
粘结滑移
剥离承载力
破坏机理
aluminum alloy plate
double shear test
bond-slip
peeling capacity
failure mechanism
