Study on bond slip performance of aluminum alloy-concrete interface based on double shear test

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. © 2020, Engineering Mechanics Press. All right reserved.