Abstract
This paper discusses the progressive collapse resistance of composite floors in which steel beams are attached to columns through shear tabs. This is a common type of system used for the gravity bay portions of seismically designed buildings on the west coast of the US. Computational simulation models are used to conduct the investigation. The models are validated through extensive comparisons to test data and then used to explore the parameters influencing the robustness of generic composite floors subjected to the removal of an intermediate column. The effects of deck thickness and slab reinforcement on the behavior of the composite system are studied. The results show that these parameters have a small effect on the collapse resistance of composite floors.