Influence of Shape Memory Alloys on Cyclic Behavior of Reinforced Concrete Joints

Shape memory alloy (SMA) is a particular type of metal alloy that has the recovery property of permanent deformation. This alloy includes the typical properties of steel, such as resistance, hardness, performance, and so on. SMAs are used in some applications, including based-isolated buildings, self-repairing building components, aircraft industry, medical industry, mechanical equipment, and effective models for computing tools. In this paper, the effect of SMAs on the cyclic behavior of reinforced concrete (RC) joints is analytically investigated. To this end, after validation of two experimental models in Seismo Struct software, some parametric studies are conducted, such as 1- the effect of compressive strength of concrete, 2- the position of SMA into the plastic zone, 3- the simultaneous use of SMA as longitudinal bars and stirrup, and 4- the use of an equivalent column with a circular cross-section containing spirals or stirrups.