الفهرس 
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Abstract
The main purpose of this thesis is to study the influence of several factors on punching shear strength of open sandwich steel concrete slabs.
An experimental program was conducted on twelve simply supported open sandwich steel-concrete slabs and two simply supported ordinary reinforced concrete slabs.
All composite slabs, tested experimentally, had the same dimensions, thickness of concrete slab and thickness of steel plates. The slabs were subjected to patch load located at the center of the slabs. The variables studied were:
1- The type of shear-bond tools in form of shear connectors and/or epoxy adhesive.
2- The spacing between shear connectors.
3- The effect of the presence of upper or/and lower light reinforcement.
4- The shape of the steel plate; either flat plate or corrugated plate.
The experimental results revealed that when the shear-bond tools were sufficient to resist the transferred shear-bond force, the observed mode of failure was changed from flexure failure to punching shear failure. Also, the studs used as shear connectors were more efficient than the epoxy adhesive to maintain the composite slabs in full composite action to resist the shear transfer and vertical deformation between steel plate and concrete slab up to the failure load.
A commercial Finite Element Program (SAP 2000) was used to perform an elastic analysis of the tested composite slabs. Many variables affecting on the behavior of the slabs were studied, such as: thickness of the steel plate, thickness of the concrete slab, spacing between shear connectors and position of the applied load.
The results of the theoretical work presented in this study reveal that varying both the thickness of the steel plate and the thickness of concrete topping did not improve the composite action of the slabs.