Experimental Assessment of RC Frame Seismic Performance with Different Slab Types

Abstract

This research aims to investigate the effect of different slab types on RC frame behavior under lateral loads and compare their performance to the innovative composite slab with galvanized steel deck and a concrete plate supported by an RC frame. Unlike previous work concentrating on joint specimens, this study intends to explore the frame's global behavior in depth, aiming to contribute essential insights for improved seismic analysis and design practices in structural engineering. Cyclic loading and unloading have been used followed by a full load scenario to ensure the full failure of the specimens. The result of this study showed that the choice of slab significantly impacts the overall lateral behavior of RC frames, demonstrating a confined failure mode, predominantly joint shear failure rather than beam-column separation observed in bare frame specimens. The introduction of a composite slab with galvanized steel deck and a concrete plate resulted in reduced base shear and roof displacement compared to other slab types, showcasing enhanced ductility during cyclic loading. Despite its lower initial stiffness, the composite slab substantially sustains the RC frame's stiffness by directly constraining its deformation. Furthermore, the composite slab and joist floor specimens, exhibit superior capabilities in energy dissipation compared to solid slab. This heightened energy dissipation is attributed to the joist floor's internal ribs, facilitating enhanced global energy dissipation, complemented by the robust strength and elastic properties of the steel sheet within the composite slab.