Comparative Analysis of Composite Beams in Large Span Floor Structures

U ovom radu su analizirane osnovne metode projektovanja spregnutih greda od čelika i betona u zgradarstvu, u skladu sa Evrokodom. Analizirana su tri različita tipa čeličnih greda spregnutih sa betonskom pločom na profilisanom limu: greda u vidu klasičnog vruće valjanog I – profila, ''STUB'' sistemi spregnute grede i spregnuta greda sa "saćastim" čeličnim nosačem. Data je komparativna analiza primene tri sistema spregnutih greda. Poređenje je izvršeno i na numeričkom primeru nosača međuspratne konstrukcije javne garaže, raspona 15.50 m.
This paper deals with main design methods for steel and concrete composite beams in buildings design, according to Eurocode. There were analyzed three different types of steel beam in combination with concrete slab on profiled steel sheet: standard hot rolled I - profile, composite STUB girder, and castellated composite beam. Comparative analysis of application of three solutions for composite beam was given. Numerical example is shown for structural elements of public car park floor structure , with 15.50 m span.