Behavior of Composite Concrete-Castellated SteelBeams in Flexure

Abstract

In this paper, the behavior of composite concrete-castellated steel beams in flexure was studied. The Finite ElementMethod was implemented for the analysis of the problem. Three-dimensional brick elements were used for concrete flange whileshell elements were used to model castellated steel section.ANSYS11 program was utilized for this purpose. A parametricstudy was conducted to clarify the behavior. The main parameterwas the variation of castellation ratios. Three degrees ofcastellation ratio were taken in to account; 25%, 35% and 45%.The results show a reduction in maximum mid-span deflection ofcomposite castellated beams with the increase of castellationratio. Moment capacity of the composite beam was increasedwith increasing of castellation ratio at the maximum permissiblemid-span deflection. This increase was 18.4%, 51.5% and 93.8%for castellation ratios 25%, 35%, and 45% respectively