الفهرس 
LITERATURE REVIEWOnly 14 pages are availabe for public view
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Abstract
Flat slab is considered a well-known and important system of floors in the construction industry. It provides to architectural designer flexibility in the arrangement of partitions, excellent spaces, and shorter height of buildings, easy form works and short time of construction. The dangerous problem of flat slabs is the tow- way shear failure because of shear and transfer of moment from slabs to columns. The effect of these straining actions, stresses is no longer distributed uniformly in the column zone.
High- strength concrete is a type of concretes which having compressive and tensile stresses higher than ordinary concrete. The main properties of high- strength concrete are then improved.
This research discusses the impact of punching shear strength of flat slabs subjected to centric and eccentric loading, with and without shear reinforcement.
In this way, 10 concrete slabs (1450 ×1450×150) with central and edge columns were casted to investigate different parameters such as concrete strengths and impact of shear reinforcements (central steel mesh and shear studs).
A finite element program (ANSYS® 14) was used to simulate the tested specimens to anticipate the impact and similarity between experimental and theoretical investigations to show the distinction in behavior considering cracking and failure loads as well as deformations and strains.
A Parametric study is also processed to analysis the variables affecting the behavior of such slabs. A simplified approach was introduced based on both experimental and analytical results. The design approach is carried out to introduce easy and simple equation for design of punching shear resistance of high and ultra-high strength concretes and the recommendation is to be implemented in design codes and be applied by structural design engineers for design of punching shear of flat slabs.