ABSTRACT
The term 'hybrid structure' usually refers to the integration of two different systems to form a third system. However, all unconventional additions of structural systems might cause changes in the structural behaviour of these systems and make them hybrid systems. Thus, it is worth analysing examples of these different additions in order to define the concept of hybrid structures. An example of the addition of the same structural units in a different way to form a structure is Herzog & de Meuron's Beijing National Stadium, which was built in Republic of China. An example of the addition of different structural units in an uncommon way to form a structure is Santiago Calatrava's Lyon Satolas Airport Railway Station, which was built in France. An example of the integration of different types of structures is the famous Sydney Opera House in Australia. Most hybrid structures are products of innovative design procedures that make them landmark buildings with particular tectonic qualities.
