ABSTRACT
Composite structures employing the composite action between steel and concrete are increasingly used in theory, design and construction practice nowadays. They enable designers to make use of favourable mechanical properties of both materials where they complement one another – concrete is efficient in compression and steel in tension. One of the widespread types of composite structure is a deck bridge with encased filler-beams. Steel beams act as rigid reinforcement in a longitudinal direction. Such types of construction have been used in our country and all over Europe from 19th century without any major change. From the structural point of view, their main advantages are relatively simple design, easy and quick erection and maintenance. Their main disadvantage, however, is their cost (RovĖák, M.; Ćuricová, A.; Kundrát, K.; Nać, ď., 2006).
