Composite structural elements are widely used due to their efficient use of each material's strength, enabling each of them to work in the most favorable conditions. In the case of steel-concrete composite structures, this means allowing concrete to work mostly in compression while it is steel that carries the tension stresses. More specifically, when talking about columns composed of steel tubes filled with reinforced concrete, these kinds of sections present a wide array of advantages born out of their composite behavior, such as reduced cross sections requirements (and more available space for architectural design), fire resistance provided by concrete (as opposed to steel profile alone), reduced construction time and no need for formwork, controlled and reduced creep and shrinkage, among many others.