Study On Bond Properties Between Aluminum Alloy And Concrete

Reinforced concrete is widely applied in industrial and civil buildings, but reinforced rust easily in the corrosion environment. And as a new material with good ductility, light weight, high strength, good corrosion resistance, and other advantages, aluminum alloy bar has wide application prospect in civil engineering. However, there isn’t any study about performance of aluminum alloy reinforced concrete structure(such as bond, bending, shear and so on). This paper focuses on studying the bond behavior of aluminum alloy bar and concrete, and provides a basic theory for the wide application prospect of aluminum alloy reinforced concrete in civil engineering.This paper study the bonding properties of aluminum alloy bar and concrete through fourteen groups central pullout tests, which include six groups pullout specimens with plain aluminum alloy bars, six groups pullout specimens with plain steel bars and two groups pullout specimens with deformed steel bars, analyzing the difference of bonding mechanism of the three pullout specimens and studying the damage feature of round steel bar specimens,drawing bond-slip model of aluminum alloy bar and concrete.Establishing the pullout test model of aluminum alloy reinforced concrete through ANSYS, the bond-slip curve is in good agreement with the experimental curve. Then obtaining the contours of stress and strain under different loads, analyzing the stress of aluminum bar.Based on the bonding mechanism of aluminum alloy and concrete, we can analyze the mechanical behavior of aluminum reinforced concrete beam. And studies show: The calculation results based on the maximum average bond strength show that the bending capacity of aluminum alloy reinforced concrete beams is only 18% of the test values, which illustrates that interface slip of concrete and tendons of such new concrete beams appears earlier.when reaching the interface bonding strength,the bearing capacity of the beam section only about 1/5 of the breaking load. In view of the actual end of the beam by 90°anchoring tendon, the calculating result by STMs is well agreement with test result. Proving that bending capacity of round bar reinforced concrete beam can be calculated by STMs, and reliable anchor is the basic of aluminum alloy Reinforced concrete beam.