Civil Engineering Association

ANALYSIS AND DESIGN OF STEEL DECK – CONCRETE COMPOSITE SLABS - Phd

As cold-formed steel decks are used in virtually every steel-framed structure for
composite slab systems, efforts to develop more efficient composite floor systems continues.
Efficient composite floor systems can be obtained by optimally utilizing the materials, which
includes the possibility of developing long span composite slab systems. For this purpose, new
deck profiles that can have a longer span and better interaction with the concrete slab are
investigated.
Two new mechanical based methods for predicting composite slab strength and behavior
are introduced. They are referred to as the iterative and direct methods. These methods, which
accurately account for the contribution of parameters affecting the composite action, are used to
predict the strength and behavior of composite slabs. Application of the methods in the
analytical and experimental study of strength and behavior of composite slabs in general reveals
that more accurate predictions are obtained by these methods compared to those of a modified
version of the Steel Deck Institute method (SDI-M). A nonlinear finite element model is also
developed to provide additional reference. These methods, which are supported by elemental
tests of shear bond and end anchorages, offer an alternative solution to performing a large
number of full-scale tests as required for the traditional m-k method. Results from 27 composite
slab tests are compared with the analytical methods

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