The use of aluminum alloys in structures: Review and outlook

Aluminum alloys have been increasingly used in structural engineering owing to their desirable mechanical properties coupled with their recyclable and sustainable nature, which can significantly contribute to reduction in construction carbon emissions and development of circular economy. Many research projects have been prompted to investigate the structural performance of aluminum alloy structures and develop accurate design methods. This paper provides a review of recent developments in research related to the use of aluminum alloys for structural purposes. The material categories and properties of aluminum alloys are first discussed, in combination with the material corrosion and recycling. Previous research work on material and structural response of aluminum alloy structures is then reviewed, including existing test results on material coupons, stub columns, long columns, beams, beam-columns, connections, web crippling, structures and relevant numerical simulations. This is followed by the research gaps identified and the corresponding future research work recommended. Lastly, with a view to the future, the use of 3D printing for the construction of new aluminum alloy structures and the application of fiber reinforced polymer to strengthen the existing aluminum alloy structures are explored.