Awadh O. Ajeel
Abstract
On the wise of structural advantages of flat plate slab systems, theresearches still deal with punching shear hazards and solution techniques foradopting a rational design comes from ...
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On the wise of structural advantages of flat plate slab systems, theresearches still deal with punching shear hazards and solution techniques foradopting a rational design comes from experimental investigations. Beside thatthere is a rapid development in production the high performance concretes usingchemical additives and wide spectrum of different features fibers which availadditional options for the structural designers.The present work is an experimental study adopts the comparison betweenuniform concrete sections with specific strength and hybrid sections (consists oftwo different layers with different strength in the top half and the bottom one) toprovide reinforced concrete flat plate slabs and conclude the more advantageoption for improving their behaviors against eventual punching shear failure.Normal strength, high strength and fibrous concrete with (34, 48 and 21) MPacompressive strength respectively are used to produce the slabs in this study.The results revealed the preference of the high strength uniform section inimproving the slab behavior besides increasing its ultimate load twice incomparison with a hybrid section contains high strength concrete at the top halfonly and there is no advantage from increasing the tension zone strength on thehybrid section slab behavior except the ductility.
