This article describes the research carried out to assess the efficiency and mechanical performance of aluminum alloys to be used in the production of hysteretic dissipative brace devices for the seismic protection of old reinforced concrete buildings. Two different standard aluminum alloys were considered: the 6082 and the 5083 alloys, supplied with the T6 and H111 tempers, respectively. Features such as the inelastic deformation capacity and energy dissipation under cyclic loading were evaluated from experimental results and several performance indexes were computed. Additionally, four heat treatments (tempers) were applied to the 6082 alloy, namely: two tempers considering solubilization followed by two different aging cycles (AG); and two tempers considering two different annealing treatments (AN). The influence of these tempers on the mechanical behavior of the 6082 alloy was assessed through monotonic tensile and cyclic tension-compression tests. The results and discussion about the mechanical performance of each of the tested alloys and tempers are also presented. A comparative analysis between mechanical performance of the standard alloys and the tempered 6082 alloys demonstrates the potential benefits induced by these tempers. The 6082 alloy annealed at 350 °C for 120 min (6082-AN350/120) has proved to be a promising solution in terms of its damage capacity and energy dissipation, representing a cost-effective solution in the production of extruded profiles with non conventional cross sections.
Journal of Materials Engineering and Performance – Springer Journals
Published: May 12, 2021