Composite action in floor systems plays an important role in enhancing load carrying capacity. Fire resistance of composite floors however remains an uncertain issue. As such, the fire response of composite floor assemblies during fire resistance tests is presented in this paper. Three composite floor slab assemblies were tested under different fire scenarios, connection configurations and fire protection schemes in the beam. It was observed that the concrete slab plays a major role in transferring forces from one part of the slab assembly to the other. Data from these fire resistance tests are being used to develop and validate numerical models for tracing the fire response of floor slabs.
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