STRENGTH AND STABILITY OF SLAB PANEL SUPPORT BEAMS

摘要

The Slab Panel Method (SPM) is a structural fire safety design method for steel-framed buildings with composite floor systems.A 3D model of an 18 m x 12 m slab panel, representative of a typical composite floor, was developed in the Finite Element Analyses (FEA) software Vulcan.The results of FEA runs show that, in this case, the secondary edge beams are more sensitive to the level of design loading than the primary edge beams in generating dependable two-way action within the slab panel.The current (2006) recommendations on loading from the SPM are potentially un-conservative for isolated panels with edge beams with simple supports.The results also show that the SPM gives accurate deflection predictions for an isolated slab panel.The effects of the initial state of the deflections on the final collapse mechanism cannot be analyzed due to the numerical models being unable to develop the full collapse mechanism before the analyses stopped running due to numerical instability.