Abstract:Aluminum alloy plate has the advantages of light weight, high strength, corrosion resistance and good extensibility. It is an ideal material for strengthening concrete structure in complex and harsh environment. In this paper, the study of bond-slip behavior of aluminum alloy-contrete interface was carried out by conducting double-sided pure shear tests on 45 members. The failure form, load-strain relationship curve, bond interface shear stress distribution curve, load-slip relationship curve and interfacial ultimate bearing capacity were obtained. The evolution of interfacial bond-slip behavior under different concrete strength grades, surface roughness of aluminum alloy plate, bond length and bond width of aluminum alloy plate were analyzed. The results show that the interfacial stress is gradually transferred from the loading end to the free end during loading. With the increase of the strength grade of concrete, and the length/width of bonding interface, the peeling capacity of the specimen is improved. But there is an effective bond length value for the aluminum alloy, beyond which the peeling bearing capacity of the specimen will not increase. Meanwhile, the surface roughness of the aluminum alloy has no substantial effect on the peeling bearing capacity of the specimen. By measuring the strain of aluminum alloy plate, the bond slip test curve of aluminum alloy plate and concrete under different parameters was obtained. The results show that the curve is of obvious interfacial softening characteristics and nonlinear behavior, which can be used to guide the actual engineering design of aluminum alloy plate reinforced concrete.