Earthquakes are natural disasters that frequently strike different regions of Latin America, causing loss of human lives, damage to civil infrastructure and economic losses. This is why the reduction of seismic risk, and in particular of the vulnerability of buildings, represents a task of great social importance. Although this task must be developed in an interdisciplinary context, it is obvious that the role of the structural engineer is preponderant, since he/she is in charge of the design, calculation and supervision of the structural system of the constructions.